Instrument logs were reviewed with error codes 0550 cuvette washing not completed, hardware failure or user pressed stop were noted prior to washing cuvettes, which could have caused contamination.The customer was notified that whenever the instrument is stopped by user, a cuvette washes 6052 must be performed.Additionally, the customer states at that time of the event quality control (qc) results were erratic but the next day the qc was in range.The customer stated that it is possible that the magnesium erratic result is specific sample related.There were no adverse trends identified during the trend review and lot search did not identify an increase in complaint activity for the current issue for the complaint lot.No nonconformances were identified related to this issue.A review of the product labeling concluded that the issue is sufficiently addressed.No product deficiency was identified.
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