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I am trying to use Solver in 64-bit Excel 2010.

When I run Solver, it opens the solver window, states that it has results and then popups the following error message:

Run-time error '53'

File not found: Solver32.dll

So, it would seem that the Solver32.dll cannot be loaded. It is however, available in the Solver Directory - i.e. C:\Program Files\Microsoft Office\Office14\Library\SOLVER contains SOLVER.XLAM and SOLVER32.dll

What have I tried so far...?

  • did a full Office 2010 Repair

  • this Microsoft forum suggested copying the Solver32.dll to C:\Windows\SysWOW64 (which is where Windows 7 stores it's 32-bit dlls).

  • this forum suggested installing the Solver add-in (.xlam and .dll) to ..\AppData..\Microsoft\AddIns

I have tried both of these and neither of them worked...

share|improve this question
Are you running 64bit excel on a 64bit OS? Are you running solver from the ribbon or in vba? Do you have any other add-ins enabled? –  Raystafarian Jul 13 '13 at 11:15
Yes, I am using a 64-bit OS. I am running solver from menus. Yes, I have other add-ins enabled... but I'd be mightily surprised if that was an issue. –  amaidment Jul 15 '13 at 10:29
Does this still occur if you disable all the other add-ins? –  Raystafarian Jul 18 '13 at 21:13

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