tune action stopped: cannot achieve constant peaks widths

Hi evryone

Please help: i just get these 2 messages which make me i can not inject from my 7890A and 5973C MSD " tune action stopped: cannot achieve constant peaks widths  " also "limits fail: pump oils (days), tune time (hours) at the same moment the Hi VAC is 0.00e00

Please any help to make my instrument run? thanks 

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