1 files changed, 3 insertions, 1 deletions

diff --git a/mat-cli b/mat-cli
index 00c5c11..253ea96 100755
--- a/mat-cli
+++ b/mat-cli
@@ -152,8 +152,10 @@ def main():
     for filename in filenames:
         class_file = mat.create_class_file(filename, args.backup,
             args.add2archive)
-        if class_file is not None:
+        if class_file is not False:
             func(class_file, filename, args.force)
+        else:
+            print('Unable to process %s' % filename)
 
 if __name__ == '__main__':
     main()