I am reading the WED Editor tutorial from the GS7 downloads page. I am currently reading the "Outside World I" section in the tutorial, and trying to complete the WED exercise. My level compiles and runs fine, until I try placing a dirt texture on the ground outside the house I made from the tutorial. When I try to build my level after placing a dirt texture on the ground, I get an error message saying:

----CRITICAL ERROR----
ERROR: Not enough virtual memory.

Press any key...

Do I need to just try increasing the virtual memory on my computer, or is there another reason why this error shows?