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I have built QuantLib using Visual C++ 2010 Express Edition after converting it from a version built under Visual C++ 2008 Epress Edition. My system is a 64 bit. I get the following error:

fatal error lnk1112: module machine type 'X86' conflicts with target machine type 'x64'

I am not good at programming and I read a lot of solutions from the web and tried them all but none of them worked for my case. Can you please help me to fix this problem?

yageek
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Francesco Messeri
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  • Are you following the official instructions at http://www.quantlib.org/install.shtml? – Luigi Ballabio Mar 24 '18 at 23:25
  • Yeah. I followed those instructions. I built correctly QuantLib and I installed Boost and I set the directory as in the instructions but when I run the command setup.py build it says "module machine x86 conflicts with target machine 64 bit" – Francesco Messeri Mar 29 '18 at 09:42

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It might be a number of things, so I suggest you post to the QuantLib mailing list which is a more appropriate forum for going back and forth and diagnosing problems.

A couple of suggestions you might try in the meantime:

  • there are unofficial binaries available for a few Python versions. If you don't need to modify the library or the wrappers, try running

    pip install QuantLib-Python

    and see if that succeeds. If it does, you're done.

  • It could be that you compiled QuantLib as a 32-bit library and your Python is compiled as 64-bit instead. Check that you have chosen the x64 platform (in VC++2010, besides the menu that lets you choose "Release" or "Debug" configuration, there should be another that lets you choose "Win32" or "x64").

But as I said, it's better to move to the mailing list.

Luigi Ballabio
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