ImportError: DLL load failed: The specified module could notbe found, SWIG, life, etc

[Bill Davy]

"Thomas Jollans" <thomas at jollans.com> wrote in message 
news:mailman.265.1278342154.1673.python-list at python.org...
> On 07/05/2010 04:35 PM, Bill Davy wrote:
>> I am struggling :-(
>
> smile!
>
>>
>> I have used SWIG to build a module called SHIP.  So I have a directory
>> containing SHIP.py and _SHIP.pyd, as follows:
>>
>> [ ...]
>>
>> Python appears to find H:\Viper\HostPC\V1\SHIP\Release\_SHIP.pyd but for
>> some reason, which I cannot fathom, says "DLL load failed".
>>
>
> Maybe it doesn't mean _SHIP.pyd, but another DLL: maybe _SHIP.pyd
> depends on some other DLL? Since you used SWIG, I'm guessing that you're
> wrapping some other library. Maybe that's what it can't find.
>

Well, there's no mention of another librarary, and "import _SHIP" is the 
first (non-comment) statement in SHIP.py
But when I run Dependency Walker against _SHIP.pyd it does say there's a 
missing DLL (WINUSB.DLL) so I suspect I've got to sort that out.

>>
>>
>> Can anyone offer me any suggestion where I am going wrong or how to 
>> tackle
>> this problem?
>>
>>
>>
>> Could it be that the Python 2.6 I am running did not use the same 
>> compiler
>> (VC6) with which I buiult _SHIP.pyd and if so, is there a way round this
>> without moving on from VC6?
>>
>
> Shouldn't be a problem, as long as the calling convention hasn't change,
> which it hasn't. If you're on a 64-bit system there might be a problem
> there with Python and some DLLs being built for different architectures?

Yep, all for the same architetcure.  I suspect it's a dependency problem. 
Oh well.

>
> Cheers,
> Thomas