Hi Sanjay,
I got a confirmation that this is a bug in our software. It might be fixed in newer versions and should be tested, repeated and reported with Product Management. It can potentially be a problem with a badly written HAL customization.
The technical description of the error is that the client attempted to send a message to the server at a time when it was already waiting for the server to reply to a previous message.
Kind Regards
HansaWorld Team