Error Weight set to 1. Weight set to 3. Error Weight set to 1. Weight set to 1. The OMG shows the observation going to trouble in Generic Conversion.
Different software is required to produce the .ULX for each instrument.
A UDL is not part of the WFPC data set and is not required for WFPC processing. A zero length UDL is sufficient for FOS observations. The FOS can be processed with a zero length ULX since the first packet of the PKX will be used instead. However, this requires that the PKX have at least one, non-corrupted record. See further Data Repair .