Re: Missing python27.dll on Win 7 64-bit



At 02:13 AM 6/17/2011, David Aldrich wrote:
Hi

I am building a 32-bit C++ application using Visual C++ Express 2008 on 64-bit Windows 7. The application links to Python, so I installed 32-bit Python 2.7.2 by running python-2.7.2.msi.

When I run my app, I get error:

... python27.dll is missing from your computer ...

and, indeed, it is in neither C:\Windows\System32 nor C:\Windows\SysWOW64.

Please will someone suggest what I am doing wrong?

Maybe nothing, maybe something, too little information to know.

First, _look_ for the file. That is, find the file wherever it is. Go to the command line and do

dir /s \ >allfiles.20110617a

Then look at that listing. WIth Python 2.7.2 which I just installed the dll ends up in SysWOW64. And now I see that they are all there, and nowhere else!

Directory of C:\Windows\SysWOW64
08/24/2010 07:47 PM 2,148,864 python26.dll
06/12/2011 03:09 PM 2,206,720 python27.dll
03/21/2010 01:43 AM 2,137,600 python31.dll
02/20/2011 10:29 PM 2,227,712 python32.dll

But in December they were in both places!

2010/11/23 21:42:42 2148864 /cygdrive/c/Windows/System32/python26.dll
2010/11/23 21:45:32 2286080 /cygdrive/c/Windows/System32/python27.dll
2010/11/16 20:16:31 2137600 /cygdrive/c/Windows/System32/python31.dll

2010/11/23 21:42:42 2148864 /cygdrive/c/Windows/SysWOW64/python26.dll
2010/11/23 21:45:32 2286080 /cygdrive/c/Windows/SysWOW64/python27.dll
2010/11/16 20:16:31 2137600 /cygdrive/c/Windows/SysWOW64/python31.dll

(Maybe something to do with the 32-bit vs. 64-bit installs mis-direction? I use only the 32-bit now...)

Now, do another install of Python 2.7.2 on another machine. Do a file listing. Where do the DLLs end up? Re-do the install on your machine. Where do the DLLs end up?

Do some more checking and tell us what you've _found_ and where...


Best regards

David
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