Importing hybridizations fail when association is tried to a slide that already has a hyb associated
Hybs and slides have a 1-to-1 relation so the problem is expected. However, the error reported back from the importer plug-in is somewhat hard to understand. The hybridization importer should not import hybridization that trying to link to a slide that is already occupied and report this issue in a more user friendly way. I suppose this needs to be treated with the nice error options set, i.e., option skip hybs that tries to connect to an occupied slide. Maybe this is already covered by the error treatment option but it is not easy to see which option it could be.