Photoshop CS6 gets AppHang when using Magnetic Lasso Several Times

Question

My operating system is a Dell Precision T3500 Windows 7 64-bit SP1 6GB RAM.
I opened a 102MB tif file which had been created in Lightroom4 by telling LR to edit in Photoshop.  I already had a small .jpg open in one window -- I am using tabbed layouts. 
I Used the magnetic lasso about four times to delete sections of the photo and replace them with a Pattern (grey backround).  Several of the mask selections were to the border of the photo and I moved the curor for the lasso beyond the border of the photo. Then I used the polygon lasso two or three times to replace additional sections which had been left behind.  I went back to the magnetic lasso.  When I went outside the boundaries of the photograph this time, CS6 hung.  I couldn't switch windows or do anything in Photoshop.  Dead.  The task manager said the program wasn't responding, and I used the task manager to kill it.

Answer 1

You could simply reach the limit of allowed points in a path. You will have to use multiple passes/ segemnts. I don't see why this should be a problem. Selections are selections. The path is merely a temporary representation of the selection border, the actual selection is pixel based, no matter what. Maybe look up a tutorial on how to work with saved selections/ channels? Just saying... Seems to me like you're trying to outsmart the program and doing everything in one go, which arely ever works...
Mylenium