I can call an application named "PinPoint.Plate" with Visual Basic, Python and Mathematica version 8 but not with version 9. I can still call Excel though. How can I fix this? This is what I did:

p = CreateCOMObject["PinPoint.Plate"]

gives the error:

 (* CreateCOMObject::netexcptn: A .NET exception occurred: System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {9B7024E3-BD35-11D2-8EE4-0080C70A9C3D} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
   at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
   at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean skipCheckThis, Boolean fillCache)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at Wolfram.NETLink.Internal.CallPacketHandler.createCOM(KernelLinkImpl ml). >> *)
  • 1
    $\begingroup$ for starters, put a semi between the Needs and the InstallNET. $\endgroup$ Mar 29, 2013 at 20:40
  • $\begingroup$ I guess it could have to do with the .NET version that is used. Version 9 uses .NET 4.0 while Version 8 seems to use 2.x according to ShowNETConsole. I guess that somehow you need to ensure that PinPoint.Plate is registered in such a way that the .NET version used by mathematica sees it. I'm no .NET expert and don't know PinPoint.Plate, so I don't have an idea how to achieve that... $\endgroup$ Mar 30, 2013 at 10:33

1 Answer 1


This is apparently a 32-bit COM object, so you need to force .NET/Link to run in 32-bit mode:

ReinstallNET["Force32Bit" -> True];
p = CreateCOMObject["PinPoint.Plate"]

Generally, the only time you need to worry about bit-ness issues is when you are calling non-.NET code, such as a 32-bit DLL via DefineDLLFunction or, as here, a 32-bit COM object.

  • $\begingroup$ WOW That was great it now works. THANKS!!! But it still doesnt call the methods quite right. I explore it a bit more $\endgroup$
    – PaulB
    Apr 16, 2013 at 20:08

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