After upgrading to TDM Portal 4.9.345.0, we started seeing "Numeric Overflow" errors when attempting to run a certain masking job.
This appears to be due to trying to insert data that is larger than what the column allows. In Oracle, if you store numeric data and this data is out of range from the column data type, then you got this type of Exception.
Upon further investigation, we found that the Range Start and End range is larger than 2 billion, and hitting a limitation.
This is corrected in FastDataMasker-188.8.131.52
Release : 4.9.1
Component : TDM Web Portal
You should work with your DBA to review the SQL statement and determine what is causing the numeric overflow.