External classifiers not used

[BeritJanssen]

We trained some new classifiers (in Weka 3.7.5) and try to use them in AuToBI by setting the classifier flags, e.g., "-pitch_accent_classifier=own.model". These classifiers aren't used, however: while the files have the correct paths (no "file not found" error thrown), the output states: Classifier for task, nominal_PitchAccent, is unavailable. Check the filename. Do you know any reason why the classifier would be considered unavailable, @AndrewRosenberg ?