I'm having problems in Map 2009 when I try to merge polygons(sdf).When i merge smalls polygons its works well.But when I try to merge big polygons,its didn`t work.Seems like a bug....Cause the Map 3D just keep processing till get instability.So I`ve to finish the appIication in the windows task manager.I work in workstation with 16 Gigas, couldn`t be a memory problem.I tried to repair the installation,reinstall and change to other PC.The same error.Does anyone saw a report like this?I'm checking the features after few merges.I'm merging two polygons and so checking before merge more.But still doesn't work.The user temp you refer is Windows/temp? But now something strange is happening.The software is crashing with small polygons too. I cleaned up my temp folder and still doesn't work.