Hi   This is a decades old issue caused by the VAS limitations of the 32bit FSX application, and the remedies are too numerous for me to list here. Please do a Google search using the terms "FSX OOM (out of memory)" and "VAS (virtual address space)" , or you could also do a search on these forums.   Using FSX In DX10 mode with "Steves DX10 Fixer" drastically improves the VAS management , and greatly reduces the occurrence of (out of memory) OOMs.   It basically boil