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EVM results via COM API of 89600 VSA SW

Question asked by gbleifuss on Aug 27, 2008
Latest reply on Jan 7, 2009 by raphael
In my current project I want to control the VSA SW via a Visual C++ program over its COM API interface and try to do WIMAX waveform demodulations and calculate EVM results.
The demodulation does work so far as I can see on the screen of the VSA SW. However, I am not able to figure out how to retrieve the EVM results in the C++ program.
I tried

_variant_t dataNames = oDisp->Traces->Item[1]->RawDataValueNames;

since according to the manual this seems to be the location where to retrieve a list of available data. However, the SW runs into a exception when calling the line above.
I tried several other things but was not actually successful. Could somebody tell me from where I will be able to retrieve the EVM results over the COM API?  

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