I've started connecting to Raster (.sid) Aerials thru mapwspace rather than inserting them thru the Planning and Analysis Workstation due to greater control with gray scale and resampling raster and such. I started noticing after I save, I can't select anything in my drawing. I was connected to a whole county Aerial .sid file, so i thought maybe if I only connect to individual tiles for my project area which consisted of 9 .sid files, the issue would go away. It didn't. I tried typing REA, purge, audit, then eventually I would crash.
Is there something wrong with FDO connections with .sid files thru mapwspace in C3D 2013???
SID files when loaded with FDO are resources hogs, I expect the raster enginge that dispalys them is taking a while to regen and not waiting before you try selecting anything is causing it to crash. You can try converting them to TIF and see if it works better.