In the last week, twice I have lost all data in the Map Information panel of an OCAD 11 map. So far neither OCAD hq or myself have been able to establish a possible cause.
Originally I thought I may have accidentally erased the data although that seems fairly difficult to do unconsciously. After this latest episode I am more in favour of a bug. I did wonder if there was a connection with saving OCAD 9 and 8 versions but my testing has failed to replicate.
If you are experiencing the same issue please report it to OCAD hq Support. I would welcome a copy so I can evaluate against my experience.