DIVA-GIS

I use an I7, Win7, 64 bit machine with Access 2003 and DIVA GIS 7.4.01. I have an Access table with 57,000 datasets and I imported it into DIVA GIS. DIVA showed the points properly but if I try to reset the legend in the properties menu (unique) I get the message "Could not convert variant of type "Null" into type (OleStr). I removed any "Null" values in the Access table, but that did not help.

Do you have an idea that can help me?

Best regards
Peter
peter.neu@trichoptera-rp.de