Add feedback when no %d specifiers found in RUNPATH

Author: andreas-el

src/ert/_c_wrappers/enkf/res_config.py

@@ -371,6 +371,15 @@ def _alloc_from_content(self, user_config_file=None, config=None):
                 f"`{config_content_dict[ConfigKeys.JOBNAME]}` instead"
             )
 
+        if (
+            ConfigKeys.RUNPATH in config_content_dict
+            and "%d" not in config_content_dict[ConfigKeys.RUNPATH]
+        ):
+            logger.error(
+                "RUNPATH keyword must contain one or two %d specifiers: "
+                f"`{config_content_dict[ConfigKeys.RUNPATH]}`"
+            )
+
         self.model_config = ModelConfig.from_dict(
             self.ensemble_config.refcase, config_content_dict
         )
@@ -478,6 +487,15 @@ def _alloc_from_dict(self, config_dict):
                 "ECLBASE ignored, using JOBNAME with value "
                 f"`{config_dict[ConfigKeys.JOBNAME]}` instead"
             )
+
+        if ConfigKeys.RUNPATH in config_dict and "%d" not in config_dict.get(
+            ConfigKeys.RUNPATH
+        ):
+            logger.error(
+                "RUNPATH keyword must contain one or two %d specifiers: "
+                f"`{config_dict[ConfigKeys.RUNPATH]}`"
+            )
+
         self.model_config = ModelConfig.from_dict(
             self.ensemble_config.refcase, config_dict
         )