NI VISA using USB gives a Parsing error

Hi All,

I am trying to initialize Pacific Power AC Source using NI VISA, communication is TCP using USB to computer, if USB is disturbed Then I loose connection with Power Supply, I create a new session every time during initialization

Session session = (MessageBasedSession)resourceManager.Open(resourceName);
// session.Add(resourceName, (MessageBasedSession)session);

return (MessageBasedSession)session;

But I end up getting Parsing error as below -

Please can someone suggest a idea or thoughts to resolve.

Thanks.