ACCESS 2010 System Resource Exceeded

Question

My team were working with access 2000, where we have our MDB project. This application(ERP) could open around 20 access forms. After we decide migrate our entire system to Acces

Answer 1

The issue is caused by 32 bit Access exceeding the 32 bit windows Virtual Memory limit of 2GB per app. I don't know why this issue does not crop up on Windows XP (didn't have time to test it).

You can track VM usage either through Performance Monitor or through code in the access app. You will see that as forms open the VM usage creeps up until access balks.

The solution is to switch to Access 64 bit on windows 64bit. Keep in mind that if you have external dll calls they need to be rewritten for 64 bit. Also ActiveX controls need to be 64 bit.

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Code to track VM

Declare PtrSafe Sub GlobalMemoryStatus Lib "kernel32" (lpBuffer As MEMORYSTATUS)

Public Type MEMORYSTATUS
   dwLength As Long
   dwMemoryLoad As Long
   dwTotalPhys As Long
   dwAvailPhys As Long
   dwTotalPageFile As Long
   dwAvailPageFile As Long
   dwTotalVirtual As Long
   dwAvailVirtual As Long
End Type

Function ReturnVirtualMemory() As Long

    Dim Mem as MEMORYSTATUS

    Mem.dwLength = Len(Mem)
    GlobalMemoryStatus Mem

    ReturnVirtualMemory = Mem.dwTotalVirtual - Mem.dwAvailVirtual
End Function