HI Windows workstations with large amounts of memory (>2GB) can fail during some stage even if the total amount of requested memory is less than 2GB. If this happens, first verify that sufficient Virtual Memory has been allocated in the Operating System. It is recommended that the maximum size of Virtual Memory be at least twice the size of the available physical memory.And if till there is error then in solver manager there is a option in advanced controls in that go to solver and there is memory allocation factor Default value is 1.0 change it to 1.1 or 1.2 it may be it will help you