MATLAB COM objects invoke problem with arrays

Hello everyone!

We would like to initialize a connection from Maltab to a COM server via. However, every time we invoke the COM object by its method "Connect", it returned to an empty string []. It is supposed to return to another COM object which can be invoked again.

Can anyone help me on this issue? Is there any improper format for the output ? Any suggestion is highly appreciated!

Thank you very much!

Di

The code is below:

h=actxserver('EMService.CxEMService.1'); 

equipmentID=0;

[output,appID] = h.invoke('Connect',equipmentID);

% the appID return to a number, which is correct; but the output should be in another COM object, but it only returned to empty [].

The method 'Connect' of h.invoke are listed below

Connect = [handle, int32] Connect(handle, int32);