Acquity H-Class QSM communication failure

Dear all, 

We are having issues with our Acquity H-Class + Xevo TQS Micro system. Yesterday, sample sequence was spontaneously paused in the middle – flow kept going without any error message in the Console. It was not possible to continue the run (unpause) in MassLynx – reports following issues with the inlet:

Inlet file – error: pump method creating instrument interface failed with error 800700A4

Error:inlet kernel not ready

Error: no more threads can be created in the system

Flow could not be stopped from the console and QSM could not be reset. I closed the Console and the MassLynx and restarted all modules. When restarted, Console reports QSM Communication error (still not possible to reset QSM). Logs show nothing except QSM communication error. 

Does anyone have any idea about what might be the cause?

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