commit e69e0f84e3698700d2702654e89e42528bd140a6
Author: Juergen Spitzmueller <[email protected]>
Date:   Wed Aug 26 15:48:52 2026 +0200

    Amend d3ec2b53953
---
 lib/lyx2lyx/parser_tools.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/lyx2lyx/parser_tools.py b/lib/lyx2lyx/parser_tools.py
index 8fd5616ec7..147df63426 100644
--- a/lib/lyx2lyx/parser_tools.py
+++ b/lib/lyx2lyx/parser_tools.py
@@ -289,10 +289,11 @@ def has_token(lines, token, directory=""):
         fn = get_quoted_value(lines, "filename", i, j)
         if directory:
             fn = os.path.join(directory, fn)
-        with open(fn) as f:
-            for line in f:
-                if line.startswith(token):
-                    return True
+        if fn.endswith(".lyx") and os.path.isfile(fn):
+            with open(fn) as f:
+                for line in f:
+                    if line.startswith(token):
+                        return True
         i += 1
         
     return False
-- 
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