HPLC sequence won't start

Hello everyone,

I submitted an HPLC run to the system, but in the Run Queue it shows the sequence is "Validating". I know validating of the sequence is normal but only for several seconds, but for my case it has been lasted for more than 2 hours. I tried to delete this sequence from the run queue but it won't let me to delete it.

I have tried to close the OpenLab software and also re-start the HPLC, but nothing helped. The connection between Openlab and HPLC should be OK since I can send commands to HPLC and it responses. 

Is there anyone has the same issue? Any recommendation is appreciated.

Thanks

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