Sorry for answering so late.
Information about your system would be great next time.
After checking the code, I assume that you had a datheaderini.xml in the same folder than DATHeader. I discovered a bug if this is present. I'll send the changed version by PM to you.
I tried here to get the same error, but without success. All is working fine here.
All new versions of DATHeader can read "old" datheaderini.xml and do update them for the new version (no version check for the xml file). I doubt that old versions can work with that changed version then (never tested).
Information about your system would be great next time.
After checking the code, I assume that you had a datheaderini.xml in the same folder than DATHeader. I discovered a bug if this is present. I'll send the changed version by PM to you.
I tried here to get the same error, but without success. All is working fine here.
All new versions of DATHeader can read "old" datheaderini.xml and do update them for the new version (no version check for the xml file). I doubt that old versions can work with that changed version then (never tested).