IviConfigServer.IviConfigStore.1: Deserialize failed. Invalid argument. 0x80047010

Hi,

We execute the following method:

IIviConfigStorePtr cs(__uuidof(IviConfigStore));

                     if (cs == NULL)

                           throw("The driver could not be Initialized because the IVI configuration server is not installed.");

….

cs->Deserialize(_bstr_t(pszIVIPath));

And intermittently we got the error: "IviConfigServer.IviConfigStore.1: Deserialize failed.  Invalid argument.       0x80047010".

The error doesn't happen all the time, but intermittently. Why is that?