Unable to case COM object.

[Anonymous]

Hi,
  I'm developing an addin for XMAU-ESSENTIAL-EN 7.0. The addin works fine until I try to use WebSocket to communicate with my addin. In my scenario, the server will send a message to the addin, then the addin will call some XMetaL APIs. But I met with the following errors while calling XMetaL.Application.ActiveDocument.

[code]Additional information: Unable to cast COM object of type 'System.__ComObject' to interface type 'XMetaL._Application'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3BBEE986-742B-11D2-BD0A-00A024C36143}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).[/code]

Does anyone has ideas about this failure?

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[XMetaLOldTimer]

Only a guess here…if you are starting up XMetaL as an out-of-process COM server, you must busy-wait until the XMetaL.Application.InitComplete property returns VARIANT_TRUE.  Otherwise, calling any other COM API method or property will likely fail.

Addam

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