i made some progress on my map and then it was like some thing bad happend, and i pressed okay and now my progress is lost. Wheres the diagnostic file saved too?
I don't know about this, but I don't think your map is still saved. Looks like you'll have to redo your work.
search for *.dmp, I think it defaults to the temp folder.
As for your map, unless you disabled it it should be autosaved every 5 minutes. Check in advanced -> Backup database