[Python-Dev] 2.7.11 Windows Installer issues on Win2008R2

[Rader, David]

Problem 1:
The .manifest information for the VC runtime dll's has been changed in the
recent versions of the 2.7.x 64-bit installers for Windows. Python fails to
run on a clean Win2008R2 install after running the Python installer to
install "Just for me". The installation succeeds if "Install for all users"
is selected.

After install completes, trying to run python results in:
The application has failed to start because it's side-by-side configuration
is incorrect. Please see the application event log or use the command-line
sxstrace.exe tool for more detail.

The event viewer log shows:
Activation context generation failed for "C:\Python27\python.exe".Error in
manifest or policy file "C:\Python27\Microsoft.VC90.CRT.MANIFEST" on line
4. Component identity found in manifest does not match the identity of the
component requested. Reference is
Microsoft.VC90.CRT,processorArchitecture="amd64",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="9.0.21022.8".
Definition is
Microsoft.VC90.CRT,processorArchitecture="amd64",publicKeyToken="1fc8b3b9a1e18e3b",type="win32",version="9.0.30729.1".
Please use sxstrace.exe for detailed diagnosis.

This means that that VC2008 SP1 dll and manifest are included in the
installer, but the Python.exe is compiled against VC2008 (_not_ SP1).
Replacing the installed manifest and VC90 with one pulled from an older
distribution with the correct 9.0.21022.8 version enables python to run.

Problem 2:
The compiled DLLs in the DLLs folder incorrectly have the VC manifest
included in them as well. This breaks the side-by-side look up, since the
VC90 dll is not in the DLLs folder. So if you try to import socket, you get
an error message like:
Traceback (most recent call last):
  File "hub\scripts\pgc.py", line 9, in <module>
    import socket
  File "C:\Python27\lib\socket.py", line 47, in <module>
    import _socket
ImportError: DLL load failed: The application has failed to start because
its si
de-by-side configuration is incorrect. Please see the application event log
or u
se the command-line sxstrace.exe tool for more detail.

Previous versions of Python for windows have had this problem but it was
corrected. It looks like it has crept back in.

--
David Rader
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