I have analyzed this a bit more and found it was actually my fault. I have written a small script to convert tasks from TimeGT to Wieldy, adding them to the Local.dat file. However, for actions with no additional notes, I did not create an empty "Notes" tag, but just omitted the tag. This does not seem to be a problem for Wieldy, everything works fine for these actions, but it crashes if these actions without Notes tag are found in a search. Maybe you can make it a little bit more robust in this regard.