Don't know if this is relevant but I just came across this bulletin in the UIC docs:
Document # TECH-0155 Software level:All Machine block:All Machine type(s):GSM1 Platform,GSM2 Platform,GSMx Platform,GSMxs Platform Target Users:Level 2 Topic:Partial Calibration Procedure: Until further notice please do not attempt a partial calibration on GSM Platform equipment. Partial calibration is defined in the Machine Calibration manual 48653201. Partial Calibration refers to individually calibrating the items specifically listed in the in the Calibration Task Selection (System Setup -> Machine -> Setup -> Calibration). It does not include items such as camera lighting or mirror calibration. Although our documentation states partial calibration is possible in some scenarios we are unsure at this time which scenarios will work. Until we can fully understand and correct this situation we are asking that you do not perform partial calibration until further notice.
Please forward any details you might have on this topic to ... Include details on partial calibrations success and specific well documented examples of how partial calibration did not work.
Please advise customers interested in using partial calibration that this issue is being investigated, there is no completion date at this time. Additional info Why repair: A partial calibration improperly completed can result in machine misplacements/accuracy issues. To correct this you will need to perform a full calibration in order to place components correctly
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