Error with python Comtypes CreateObject

I have a C# dll registered on COM which i am trying to use in Python code using comtypes , the code works perfectly fine in the machine i am developing the c# dll but fails to load when deployed in a different machine with all the required files .

Here is the error i am getting

Traceback (most recent call last):
  File "C:\Python27\Lib\site-packages\bellagio\DriverManager\audiotest\apx525\apx525_Wrapper.py", line 257, in <module>
    c._Connect()
  File "C:\Python27\Lib\site-packages\bellagio\DriverManager\audiotest\apx525\apx525_Wrapper.py", line 51, in _Connect
    self.apx525 = CreateObject("APxWrapper.APxWrapper",None,None,apx.IAPxWrapper)
  File "C:\Python27\lib\site-packages\comtypes\client\__init__.py", line 235, in CreateObject
    obj = comtypes.CoCreateInstance(clsid, clsctx=clsctx, interface=interface)
  File "C:\Python27\lib\site-packages\comtypes\__init__.py", line 1145, in CoCreateInstance
    _ole32.CoCreateInstance(byref(clsid), punkouter, clsctx, byref(iid), byref(p))
  File "_ctypes/callproc.c", line 936, in GetResult
WindowsError: [Error -2147024894] The system cannot find the file specified

and the corresponding python code is

try:
    from comtypes.client import CreateObject,GetModule, Constants, GetEvents
    from comtypes import COMError
    GetModule("P:\\Share\\Test\\TestBed\\Bellagio\\dll\\APxWrapper.tlb")
    from comtypes.gen import APxWrapper as apx
except:
    tblog.warnLog("Need to install comtypes package, AP driver not imported")

class IAPxWrapper_Impl(object):
    def __init__(self):
        self.apx525 = None
        self.activeSignalPath = ''
        self.activeMeasurement = ''

    def _Connect(self):


        self.apx525 = CreateObject("APxWrapper.APxWrapper",None,None,apx.IAPxWrapper)
        self.apx525._GUIVisible = True;

        return True

c = IAPxWrapper_Impl()
c._Connect()

Note that the folder has 3 files ApxWrapper.tlb .APxWrapper.dll and a dependency dll . GetModule works fine and pyton files are generated in comtypes.gen folder Any hints on this highly appreciated

Sanjay

The issue was with the version of .Net dll referenced in both the machine , Python somehow does not give the complete error detail , I was able to make it out by running a sample c# application i wrote and the c# exception thrown had all the necessary info .