Hi Eike,
Let's resume next week.
OK, attached is a diff file showing what I did so far. -saFuncTableOOoLO has 3 itmes, each a bit different to see if that makes any difference (it doesn't). -I open a new spreadsheet and enter e.g. [=WEEKS()] in a cell, then I save as xlsx. Next I open the xlsx file and the cell contains [=com.sun.star.sheet.addin.datefunctions.getdiffweeks()] I can only hope I did something silly or forgot something that I should not have forgotten. Should you find what is wrong with the 'patch', I'm happy to add all add-in functions and make it a proper patch. Winfried
Attachment:
59727-wip.diff
Description: 59727-wip.diff