As a part of our planned masking job, we selected (and confirmed) 35 tables. However when the job 'failed' due to error, when I checked in the back-end of the database, it had 41 tables already processed and only a few of those 41 tables are common.
User error: select masking scope had “All tables” selected v/s “Confirmed” tables . "All Tables" was selected and hence, all tables were processed instead of confirmed tables.
Release : 4.8
Component : CA Test Data Manager
The Select Masking Scope selection should be set to " Confirmed Tables only"