Windows Server cannot execute a py2exe-generated app

Question

A simple python script needs to run on a windows server with no python installed.

I used py2exe, which generated a healthy dist subdirectory, with script.exe that runs fine on the local machine.
However, when I run it on the server (Windows Server 2003 R2), it produces this:
The system cannot execute the specified program.

and ERRORLEVEL is 9020.

Any ideas?

Answer 1

I did not find the cause to the problem, but using python 2.5 with py2exe on the same script worked fine on the server.

I guess there is something wrong with py2exe under 2.6.

Answer 2

For py2exe to work, you have to include the correct version of the Microsoft C runtime DLL with your application.

For Python2.6, this is MSVCR90.dll version 9.0.21022.8, which can be obtained from the Microsoft Visual C++ 2008 Redistributable Package:

http://www.microsoft.com/downloads/details.aspx?FamilyID=9b2da534-3e03-4391-8a4d-074b9f2bc1bf&displaylang=en

NOTE that the SP1 of this installer contains a different version of the DLL, and will not work.

I spent a while earlier this year explaining this carefully in the py2exe tutorial, so I'll just link to that: http://www.py2exe.org/index.cgi/Tutorial#Step5

Answer 3

It could be missing some required DLLs. Try using depends.exe to identify what might be missing. It's probably an msvc-something-something.dll

Answer 4

Because Python 2.6 is built against Visual Studio 2008, the target machine must also have the Visual Studio 2008 libraries, available from the Visual C++ 2008 Redistributable package.

I confirmed that on a clean build of Windows XP or Server 2003 (neither of which have the Visual Studio 2008 redistributable), a Python 2.6 py2exe executable will fail with the aforementioned error, but after installing the redistributable package, the executable runs normally.