diff --git a/OMPython/om_session_omc.py b/OMPython/om_session_omc.py
index e1d0e461..de128913 100644
--- a/OMPython/om_session_omc.py
+++ b/OMPython/om_session_omc.py
@@ -466,7 +466,7 @@ def sendExpression(self, expr: str, parsed: bool = True, raise_on_error: bool =
             if not self._re_log_raw:
                 self._re_log_raw = re.compile(
                     pattern=r"\s*info = record OpenModelica\.Scripting\.SourceInfo\n"
-                            r"\s*filename = \"(.*?)\",\n"
+                            r"\s*file[nN]ame = \"(.*?)\",\n"  # older omc: filename, newer: fileName
                             r"\s*readonly = (.*?),\n"
                             r"\s*lineStart = (\d+),\n"
                             r"\s*columnStart = (\d+),\n"
diff --git a/tests/test_OMSessionCmd.py b/tests/test_OMSessionCmd.py
index 7dbb9705..dfcb19db 100644
--- a/tests/test_OMSessionCmd.py
+++ b/tests/test_OMSessionCmd.py
@@ -1,3 +1,5 @@
+import pytest
+
 import OMPython
 
 
@@ -18,3 +20,10 @@ def test_isPackage2():
 
 
 # TODO: add more checks ...
+
+
+def test_error_message_file():
+    # omc names the file field of a message filename or fileName (OpenModelica issue 17891)
+    omcs = OMPython.OMCSessionLocal()
+    with pytest.raises(OMPython.OMSessionException, match=r"\[bad\.mo:"):
+        omcs.sendExpression('loadString("model M Real x = ; end M;", "bad.mo")')