Triangulate and Contour

When I try to triangulate and contour a certain area why is it that I get
FATAL ERROR: UNHANDLED ACCESS VIOLATION READING 0x0008 Exception at
33ed2d70h. What does this mean and what do i have to do to fix it?
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Justin Brungard
FATAL ERROR: UNHANDLED ACCESS VIOLATION READING 0x0008 Exception at
33ed2d70h. What does this mean and what do i have to do to fix it?
--
Justin Brungard