Ladies and Gents, Have a fresh install of SW2006SP1 being driven P4 2.4HT with 1GB DDR400, and a Radeon9800Pro card sporting Win2k SP4. Occasionally, the system will bog when I am panning or zooming even the most basic model. If I close the file and reload, the problem goes away, and I may not see it again until the next day, or I may see it again in 5 minutes. Anyone else having this issue? tia, Elp.