T90, Error 525

titration on both Rondos on our T90 have started to frequently stop in the middle of a batch (say 5 out of 20 samples or later) after the most recent sample is completed and the platform raises up, it is rinsing itself and approaches the vertical stop point and then it all ends with "425". We just had pm service a month ago. Now this is ocurring every day and restarting the computer and the T90 seems to help only a bit (without restart I noticed LabX will only run one sample at a time; with a restart it may run several samples before stopping in the middle of a batch - sometimes). LabX was updated over a year ago to last version.