diff --git a/.gitignore b/.gitignore
index f7161f1..b7c89c9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,5 +4,6 @@ abap2xlsx
 abap2xlsx-demos
 open-abap-core
 src/abap.ts
+src/abap.js
 input
 output
\ No newline at end of file
diff --git a/abap.mjs b/abap.mjs
index 6331681..bfd5d99 100644
--- a/abap.mjs
+++ b/abap.mjs
@@ -10,7 +10,9 @@ function escape(input) {
   if (input.charCodeAt(0) === 0xFEFF) {
     input = input.substr(1);
   }
-  return input.replaceAll("`", "\\`").replaceAll("${", "\\${").trimEnd();
+  return input.replaceAll("\\", "\\\\")
+    .replaceAll("`", "\\`")
+    .replaceAll("${", "\\${").trimEnd();
 }
 
 function add(name, contents) {
@@ -60,7 +62,7 @@ for (const dirent of fs.readdirSync("abap2xlsx/src", {recursive: true, withFileT
 
 /////////////////////////////////////////
 
-fs.writeFileSync("src/abap.ts", output + "\n};");
+fs.writeFileSync("src/abap.js", output + "\n};");
 for (const filename in files) {
   fs.writeFileSync(path.join("input", filename), files[filename]);
 }
\ No newline at end of file
diff --git a/abap_transpile.json b/abap_transpile.json
index 8697fba..2a54150 100644
--- a/abap_transpile.json
+++ b/abap_transpile.json
@@ -9,6 +9,7 @@
     "ignoreSyntaxCheck": false,
     "addFilenames": true,
     "addCommonJS": true,
+    "skipReposrc": true,
     "unknownTypes": "runtimeError",
     "skip": []
   }
diff --git a/package-lock.json b/package-lock.json
index 621741c..3722564 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,6 +13,8 @@
         "@abaplint/runtime": "^2.10.17",
         "@abaplint/transpiler": "^2.10.17",
         "@abaplint/transpiler-cli": "^2.10.17",
+        "assert": "^2.1.0",
+        "browserify-zlib": "^0.2.0",
         "buffer": "^6.0.3",
         "copy-webpack-plugin": "^12.0.2",
         "crypto-browserify": "^3.12.0",
@@ -21,6 +23,7 @@
         "html-webpack-plugin": "^5.6.0",
         "monaco-editor": "^0.51.0",
         "path-browserify": "^1.0.1",
+        "process": "^0.11.10",
         "split-grid": "^1.0.11",
         "stream-browserify": "^3.0.0",
         "string_decoder": "^1.3.0",
@@ -838,6 +841,34 @@
       "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
       "dev": true
     },
+    "node_modules/assert": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/assert/-/assert-2.1.0.tgz",
+      "integrity": "sha512-eLHpSK/Y4nhMJ07gDaAzoX/XAKS8PSaojml3M0DM4JpV1LAi5JOJ/p6H/XWrl8L+DzVEvVCW1z3vWAaB9oTsQw==",
+      "dev": true,
+      "dependencies": {
+        "call-bind": "^1.0.2",
+        "is-nan": "^1.3.2",
+        "object-is": "^1.1.5",
+        "object.assign": "^4.1.4",
+        "util": "^0.12.5"
+      }
+    },
+    "node_modules/available-typed-arrays": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.7.tgz",
+      "integrity": "sha512-wvUjBtSGN7+7SjNpq/9M2Tg350UZD3q62IFZLbRAR1bSMlCo1ZaeW+BJ+D090e4hIIZLBcTDWe4Mh4jvUDajzQ==",
+      "dev": true,
+      "dependencies": {
+        "possible-typed-array-names": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -1026,6 +1057,15 @@
         "node": ">= 0.12"
       }
     },
+    "node_modules/browserify-zlib": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/browserify-zlib/-/browserify-zlib-0.2.0.tgz",
+      "integrity": "sha512-Z942RysHXmJrhqk88FmKBVq/v5tqmSkDz7p54G/MGyjMnCFFnC79XWNbg+Vta8W6Wb2qtSZTSxIGkJrRpCFEiA==",
+      "dev": true,
+      "dependencies": {
+        "pako": "~1.0.5"
+      }
+    },
     "node_modules/browserslist": {
       "version": "4.23.3",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.23.3.tgz",
@@ -1681,6 +1721,23 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/define-properties": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.2.1.tgz",
+      "integrity": "sha512-8QmQKqEASLd5nx0U1B1okLElbUuuttJ/AnYmRXbbbGDWh6uS208EjD4Xqq/I9wK7u0v6O08XhTWnt5XtEbR6Dg==",
+      "dev": true,
+      "dependencies": {
+        "define-data-property": "^1.0.1",
+        "has-property-descriptors": "^1.0.0",
+        "object-keys": "^1.1.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -2243,6 +2300,15 @@
         }
       }
     },
+    "node_modules/for-each": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",
+      "integrity": "sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==",
+      "dev": true,
+      "dependencies": {
+        "is-callable": "^1.1.3"
+      }
+    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -2410,6 +2476,21 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-tostringtag": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/has-tostringtag/-/has-tostringtag-1.0.2.tgz",
+      "integrity": "sha512-NqADB8VjPFLM2V0VvHUewwwsw0ZWBaIdgo+ieHtK3hasLz4qeCRjYcqfB6AQrBggRKppKF8L52/VqdVsO47Dlw==",
+      "dev": true,
+      "dependencies": {
+        "has-symbols": "^1.0.3"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/hash-base": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-3.0.4.tgz",
@@ -2736,6 +2817,22 @@
         "node": ">= 10"
       }
     },
+    "node_modules/is-arguments": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/is-arguments/-/is-arguments-1.1.1.tgz",
+      "integrity": "sha512-8Q7EARjzEnKpt/PCD7e1cgUS0a6X8u5tdSiMqXhojOdoV9TsMsiO+9VLC5vAmO8N7/GmXn7yjR8qnA6bVAEzfA==",
+      "dev": true,
+      "dependencies": {
+        "call-bind": "^1.0.2",
+        "has-tostringtag": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-binary-path": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
@@ -2748,6 +2845,18 @@
         "node": ">=8"
       }
     },
+    "node_modules/is-callable": {
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.7.tgz",
+      "integrity": "sha512-1BC0BVFhS/p0qtw6enp8e+8OD0UrK0oFLztSjNzhcKA3WDuJxxAPXzPuPtKkjEY9UUoEWlX/8fgKeu2S8i9JTA==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-core-module": {
       "version": "2.15.1",
       "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.15.1.tgz",
@@ -2787,6 +2896,21 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/is-generator-function": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/is-generator-function/-/is-generator-function-1.0.10.tgz",
+      "integrity": "sha512-jsEjy9l3yiXEQ+PsXdmBwEPcOxaXWLspKdplFUVI9vq1iZgIekeC0L167qeu86czQaxed3q/Uzuw0swL0irL8A==",
+      "dev": true,
+      "dependencies": {
+        "has-tostringtag": "^1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-glob": {
       "version": "4.0.3",
       "resolved": "https://registry.npmjs.org/is-glob/-/is-glob-4.0.3.tgz",
@@ -2817,6 +2941,22 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/is-nan": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/is-nan/-/is-nan-1.3.2.tgz",
+      "integrity": "sha512-E+zBKpQ2t6MEo1VsonYmluk9NxGrbzpeeLC2xIViuO2EjU2xsXsBPwTr3Ykv9l08UYEVEdWeRZNouaZqF6RN0w==",
+      "dev": true,
+      "dependencies": {
+        "call-bind": "^1.0.0",
+        "define-properties": "^1.1.3"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-network-error": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/is-network-error/-/is-network-error-1.1.0.tgz",
@@ -2862,6 +3002,21 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/is-typed-array": {
+      "version": "1.1.13",
+      "resolved": "https://registry.npmjs.org/is-typed-array/-/is-typed-array-1.1.13.tgz",
+      "integrity": "sha512-uZ25/bUAlUY5fR4OKT4rZQEBrzQWYV9ZJYGGsUmEJ6thodVJ1HX64ePQ6Z0qPWP+m+Uq6e9UugrE38jeYsDSMw==",
+      "dev": true,
+      "dependencies": {
+        "which-typed-array": "^1.1.14"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/is-wsl": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/is-wsl/-/is-wsl-3.1.0.tgz",
@@ -3282,6 +3437,49 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/object-is": {
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/object-is/-/object-is-1.1.6.tgz",
+      "integrity": "sha512-F8cZ+KfGlSGi09lJT7/Nd6KJZ9ygtvYC0/UYYLI9nmQKLMnydpB9yvbv9K1uSkEu7FU9vYPmVwLg328tX+ot3Q==",
+      "dev": true,
+      "dependencies": {
+        "call-bind": "^1.0.7",
+        "define-properties": "^1.2.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/object-keys": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/object-keys/-/object-keys-1.1.1.tgz",
+      "integrity": "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
+    "node_modules/object.assign": {
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/object.assign/-/object.assign-4.1.5.tgz",
+      "integrity": "sha512-byy+U7gp+FVwmyzKPYhW2h5l3crpmGsxl7X2s8y43IgxvG4g3QZ6CffDtsNQy1WsmZpQbO+ybo0AlW7TY6DcBQ==",
+      "dev": true,
+      "dependencies": {
+        "call-bind": "^1.0.5",
+        "define-properties": "^1.2.1",
+        "has-symbols": "^1.0.3",
+        "object-keys": "^1.1.1"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/obuf": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/obuf/-/obuf-1.1.2.tgz",
@@ -3380,6 +3578,12 @@
         "node": ">=6"
       }
     },
+    "node_modules/pako": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
+      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw==",
+      "dev": true
+    },
     "node_modules/param-case": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/param-case/-/param-case-3.0.4.tgz",
@@ -3520,6 +3724,15 @@
         "node": ">=8"
       }
     },
+    "node_modules/possible-typed-array-names": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/possible-typed-array-names/-/possible-typed-array-names-1.0.0.tgz",
+      "integrity": "sha512-d7Uw+eZoloe0EHDIYoe+bQ5WXnGMOpmiZFTuMWCwpjzzkL2nTjcKiAk4hh8TjnGye2TwWOk3UXucZ+3rbmBa8Q==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.4.45",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.45.tgz",
@@ -3636,6 +3849,15 @@
         "renderkid": "^3.0.0"
       }
     },
+    "node_modules/process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
+      "integrity": "sha512-cdGef/drWFoydD1JsMzuFf8100nZl+GT+yacc2bEced5f9Rjk4z+WtFUTBu9PhOi9j/jfmBPu0mMEY4wIdAF8A==",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
     "node_modules/process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -4772,6 +4994,19 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/util": {
+      "version": "0.12.5",
+      "resolved": "https://registry.npmjs.org/util/-/util-0.12.5.tgz",
+      "integrity": "sha512-kZf/K6hEIrWHI6XqOFUiiMa+79wE/D8Q+NCNAWclkyg3b4d2k7s0QGepNjiABc+aR3N1PAyHL7p6UcLY6LmrnA==",
+      "dev": true,
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "is-arguments": "^1.0.4",
+        "is-generator-function": "^1.0.7",
+        "is-typed-array": "^1.1.3",
+        "which-typed-array": "^1.1.2"
+      }
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -5192,6 +5427,25 @@
         "node": ">= 8"
       }
     },
+    "node_modules/which-typed-array": {
+      "version": "1.1.15",
+      "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.15.tgz",
+      "integrity": "sha512-oV0jmFtUky6CXfkqehVvBP/LSWJ2sy4vWMioiENyJLePrBO/yKyV9OyJySfAKosh+RYkIl5zJCNZ8/4JncrpdA==",
+      "dev": true,
+      "dependencies": {
+        "available-typed-arrays": "^1.0.7",
+        "call-bind": "^1.0.7",
+        "for-each": "^0.3.3",
+        "gopd": "^1.0.1",
+        "has-tostringtag": "^1.0.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/wildcard": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/wildcard/-/wildcard-2.0.1.tgz",
diff --git a/package.json b/package.json
index c5fd2b8..41ade9b 100644
--- a/package.json
+++ b/package.json
@@ -20,6 +20,8 @@
     "@abaplint/runtime": "^2.10.17",
     "@abaplint/transpiler": "^2.10.17",
     "@abaplint/transpiler-cli": "^2.10.17",
+    "assert": "^2.1.0",
+    "browserify-zlib": "^0.2.0",
     "buffer": "^6.0.3",
     "copy-webpack-plugin": "^12.0.2",
     "crypto-browserify": "^3.12.0",
@@ -28,6 +30,7 @@
     "html-webpack-plugin": "^5.6.0",
     "monaco-editor": "^0.51.0",
     "path-browserify": "^1.0.1",
+    "process": "^0.11.10",
     "split-grid": "^1.0.11",
     "stream-browserify": "^3.0.0",
     "string_decoder": "^1.3.0",
diff --git a/public/zcl_excel_demo1.xlsx b/public/zcl_excel_demo1.xlsx
index 824ba3f..5bd3bda 100644
Binary files a/public/zcl_excel_demo1.xlsx and b/public/zcl_excel_demo1.xlsx differ
diff --git a/public/zcl_excel_demo2.xlsx b/public/zcl_excel_demo2.xlsx
index 4dc9d84..4d9b3b0 100644
Binary files a/public/zcl_excel_demo2.xlsx and b/public/zcl_excel_demo2.xlsx differ
diff --git a/src/index.css b/src/index.css
index 8dacf07..b0334e9 100644
--- a/src/index.css
+++ b/src/index.css
@@ -7,6 +7,10 @@ body, html, .inner, .outer {
   overflow: hidden;
 }
 
+a {
+  color: white;
+}
+
 #horizon {
   display: grid;
   grid-template-columns: 1fr 5px 1fr;
diff --git a/src/index.ts b/src/index.ts
index 806e55f..3b597c9 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,7 +1,7 @@
 // @ts-ignore
 global.MonacoEnvironment = {
   globalAPI: true,
-  getWorkerUrl: function (_moduleId: any, label: any) {
+  getWorkerUrl: function (_moduleId, label) {
     /*
     if (label === "json") {
       return "./json.worker.bundle.js";
@@ -18,12 +18,15 @@ import "./index.css";
 import "../public/favicon-16x16.png";
 import "../public/favicon-32x32.png";
 import * as monaco from "monaco-editor";
-import {config, Transpiler} from "@abaplint/transpiler";
-import {ABAP, MemoryConsole} from "@abaplint/runtime";
+import {config, ITranspilerOptions, Transpiler, UnknownTypesEnum} from "@abaplint/transpiler";
+// import {ABAP, MemoryConsole} from "@abaplint/runtime";
 import * as abaplint from "@abaplint/core";
 import * as abapMonaco from "@abaplint/monaco";
 import Split from "split-grid";
-import { abapfiles } from "./abap";
+import { abapfiles } from "./abap.js";
+import * as initabap from "../output/init.mjs";
+import {Buffer} from "buffer";
+console.dir(initabap); // just to make sure its not shaked away
 
 const reg = new abaplint.Registry(new abaplint.Config(JSON.stringify(config)));
 for (const filename in abapfiles) {
@@ -106,9 +109,37 @@ document.getElementById("demoDropdown").addEventListener("change", (e) => {
 // see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AsyncFunction
 const AsyncFunction = new Function(`return Object.getPrototypeOf(async function(){}).constructor`)();
 
+async function sanitizeAndRun(js: string) {
+  let lines = js.split("\n");
+  lines = lines.filter(row => row.includes("await import") === false);
+  lines = lines.filter(row => row.includes("export {") === false);
+  js = lines.join("\n");
+  js += `
+const excel = await abap.Classes["ZCL_EXCEL_DEMO1"].zif_excel_demo_output$run();
+const writer = new abap.Classes["ZCL_EXCEL_WRITER_2007"]();
+await writer.constructor_();
+const xstring = await writer.zif_excel_writer$write_file({io_excel: excel});
+return xstring;
+  `;
+//  console.dir(js);
+
+  const f = new AsyncFunction("abap", js);
+  const res = await f(globalThis.abap);
+  console.dir(res);
+
+  var file = document.createElement('a');
+  file.setAttribute('href', 'data:application/octet-stream;base64,' + Buffer.from(res.get(), "hex").toString("base64"));
+  file.setAttribute('download', "foo.xlsx");
+  file.innerText = "Download, " + (res.get().length / 2) + " bytes";
+  document.getElementById("container2").appendChild(file);
+}
+
 async function abapChanged() {
+  // @ts-ignore
+  console.dir(globalThis.abap);
+  const contents = editor1.getValue();
+
   try {
-    const contents = editor1.getValue();
     const file = new abaplint.MemoryFile(filename, contents);
     reg.updateFile(file);
     reg.parse();
@@ -119,6 +150,7 @@ async function abapChanged() {
       document.getElementById("container2").innerHTML = `<iframe src="https://view.officeapps.live.com/op/view.aspx?src=https://abap2xlsx.github.io/abap2xlsx-web/${name}.xlsx" title="Excel"></iframe>`;
 
       setTimeout(() => monaco.editor.getEditors()[0].focus(), 1000);
+      return;
     } else {
       const markers = monaco.editor.getModelMarkers({});
       if (markers.length > 0) {
@@ -130,16 +162,33 @@ async function abapChanged() {
         return;
       }
 
-      document.getElementById("container2").innerHTML = `todo, compiling`;
+      document.getElementById("container2").innerHTML = `<b>Compiling</b>`;
+    }
+  } catch (error) {
+    console.dir(error);
+  }
 
-      // const res = await new Transpiler().runRaw([{filename, contents}]);
+  try {
+    const options: ITranspilerOptions = {
+      "ignoreSyntaxCheck": false,
+      "addFilenames": true,
+      "addCommonJS": true,
+      "skipReposrc": true,
+      "unknownTypes": UnknownTypesEnum.runtimeError,
     }
+    const result = await new Transpiler(options).run(reg);
+    document.getElementById("container2").innerHTML = `<b>Compiling Done</b><br><br>`;
+    const compiled = result.objects.find(o => o.filename.includes("zcl_demo.clas.mjs"))?.chunk.getCode();
+    await sanitizeAndRun(compiled);
   } catch (error) {
+    document.getElementById("container2").innerHTML = `<u><b>Issues found during compilation or execution</b></u><br>`;
     console.dir(error);
+    document.getElementById("container2").innerHTML += error.toString();
   }
 }
 
 editor1.onDidChangeModelContent(abapChanged);
 abapChanged();
 editor1.focus();
-const abap = new ABAP({console: new MemoryConsole()});
+
+//const abap = new ABAP({console: new MemoryConsole()});
diff --git a/tsconfig.json b/tsconfig.json
index 32f32ea..f3d41c8 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,7 @@
     "moduleResolution": "node",
     "target": "es5",
     "outDir": "./dist",
-    "lib": ["dom", "es5", "es2015.collection", "es2015.promise"],
+    "lib": ["dom", "es5", "es2015.collection", "es2015.promise", "es2015"],
     "types": [],
     "baseUrl": ".",
     "typeRoots": ["node_modules/@types"]
diff --git a/webpack.config.js b/webpack.config.js
index 6acd230..b38a9a3 100644
--- a/webpack.config.js
+++ b/webpack.config.js
@@ -10,8 +10,13 @@ module.exports = {
   entry: {
     app: "./src/index.ts",
     "editor.worker": "monaco-editor/esm/vs/editor/editor.worker.js",
+    /*
     "json.worker": "monaco-editor/esm/vs/language/json/json.worker",
     "ts.worker": "monaco-editor/esm/vs/language/typescript/ts.worker",
+    */
+  },
+  experiments: {
+    topLevelAwait: true
   },
   devServer: {
     open: true,
@@ -19,19 +24,24 @@ module.exports = {
   },
   resolve: {
     fallback: {
+      "./%23ui2%23cl_json.clas.mjs": false,
       "buffer": require.resolve("buffer/"),
+      "assert": false,
       "stream": require.resolve("stream-browserify"),
       "crypto": false,
       "path": require.resolve("path-browserify"),
       "fs": false,
       "http": false,
       "https": false,
-      "zlib": false,
+      "process": require.resolve("process"),
+      "zlib": require.resolve("browserify-zlib"),
+      "tls": false,
+      "net": false,
       "util": false,
       "url": false,
       "string_decoder": require.resolve("string_decoder/"),
     },
-    extensions: [".ts", ".js"],
+    extensions: [".ts", ".js", ".mjs"],
   },
   output: {
     globalObject: "self",
@@ -74,6 +84,7 @@ module.exports = {
     }),
     new webpack.ProvidePlugin({
       Buffer: ["buffer", "Buffer"],
+      process: 'process/browser',
     }),
     new CopyPlugin({
       patterns: [