IMS masking job GTXMSKF not able to mask data set with more than 100k records

Document ID : KB000107775
Last Modified Date : 25/07/2018
Show Technical Document Details
Issue:
Trying to mask IMS data. 50k records runs as expected - i.e. the data is masked. However, when more than 100k or any big numbers in the input data set, nothing is masked. The job does not throw any error, GRIDT01.REP.IMS.I.REPT and GRIDT01.REP.IMS.I.AUDIT are also empty.
Environment:
TDM 4.5
Mainframe 
Resolution:
It has nothing to do with TDM code, but rather the use of FilemasterPlus for IMS. TDM is performing all the way up to 100K records.  However, above that, FilemasterPlus is having an issue.
Additional Information:

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