Troubleshooting: When I try to export a large number of map sheets, ArcMap crashes
When ArcFM exports map sheets, it leverages ArcGIS's export code. Exporting too many PDF files at once can cause memory problems.
In 8.3 SP1, ArcFM has many performance enhancements to the map sheet export to .pdf files. Despite these enhancements, we are continuing to fight the constraint of physical memory when doing such large exports. This also depends on the memory capacity of the machine you are using; the slower the processor and less the memory, the sooner the export will fail.
Schneider Electric recommends breaking large map sets into smaller map sets with fewer map sheets in each and exporting each map set individually.