diff --git a/recipe/meta.json b/recipe/meta.json
index 327ae3a..371f9f8 100644
--- a/recipe/meta.json
+++ b/recipe/meta.json
@@ -1,6 +1,6 @@
 {
-  "build": "py_1",
-  "buildnum": 1,
+  "build": "py_0",
+  "buildnum": 0,
   "name": "wxvx",
   "packages": {
     "dev": [
@@ -50,5 +50,5 @@
       "zarr ==3.1.*"
     ]
   },
-  "version": "0.5.0"
+  "version": "0.5.1"
 }
diff --git a/src/wxvx/resources/info.json b/src/wxvx/resources/info.json
index 92ed23b..4331341 100644
--- a/src/wxvx/resources/info.json
+++ b/src/wxvx/resources/info.json
@@ -1,4 +1,4 @@
 {
-  "buildnum": "1",
-  "version": "0.5.0"
+  "buildnum": "0",
+  "version": "0.5.1"
 }
diff --git a/src/wxvx/tests/test_util.py b/src/wxvx/tests/test_util.py
index d2b880d..73d3446 100644
--- a/src/wxvx/tests/test_util.py
+++ b/src/wxvx/tests/test_util.py
@@ -59,16 +59,13 @@ def test_util_classify_data_format__file_missing(fakefs, logged):
     assert logged(f"Path not found: {path}")
 
 
-def test_util_classify_data_format__file_unrecognized(fakefs):
+def test_util_classify_data_format__file_unrecognized(fakefs, logged):
     path = fakefs / "datafile"
     path.touch()
     util.classify_data_format.cache_clear()
-    with (
-        patch.object(util.magic, "from_file", return_value="What Is This I Don't Even"),
-        raises(util.WXVXError) as e,
-    ):
-        util.classify_data_format(path=path)
-    assert str(e.value) == f"Could not determine format of {path}"
+    with patch.object(util.magic, "from_file", return_value="What Is This I Don't Even"):
+        assert util.classify_data_format(path=path) == util.DataFormat.UNKNOWN
+    assert logged(f"Could not determine format of {path}")
 
 
 def test_util_classify_data_format__zarr(fakefs):
@@ -79,16 +76,13 @@ def test_util_classify_data_format__zarr(fakefs):
         assert util.classify_data_format(path=path) == util.DataFormat.ZARR
 
 
-def test_util_classify_data_format__zarr_corrupt(fakefs):
+def test_util_classify_data_format__zarr_corrupt(fakefs, logged):
     path = fakefs / "datadir"
     path.mkdir()
     util.classify_data_format.cache_clear()
-    with (
-        patch.object(util.zarr, "open", side_effect=Exception("failure")),
-        raises(util.WXVXError) as e,
-    ):
-        util.classify_data_format(path=path)
-    assert str(e.value) == f"Could not determine format of {path}"
+    with patch.object(util.zarr, "open", side_effect=Exception("failure")):
+        assert util.classify_data_format(path=path) == util.DataFormat.UNKNOWN
+    assert logged(f"Could not determine format of {path}")
 
 
 def test_util_classify_data_format__zarr_missing(fakefs, logged):
diff --git a/src/wxvx/util.py b/src/wxvx/util.py
index 3ddbc8c..f6ee1d4 100644
--- a/src/wxvx/util.py
+++ b/src/wxvx/util.py
@@ -92,7 +92,8 @@ def classify_data_format(path: str | Path) -> DataFormat:
     else:
         logging.warning("Path not found: %s", path)
         return DataFormat.UNKNOWN
-    raise WXVXError("Could not determine format of %s" % path)
+    logging.error("Could not determine format of %s", path)
+    return DataFormat.UNKNOWN
 
 
 def classify_url(url: str) -> tuple[Proximity, str | Path]: