We discovered an issue when using the "Mask as number" feature with masking option "TRIMVALUES" set to "N" in FDM and Portal.
Masking job fails and throws this error:
Release : 4.9.1
Component : Mainframe
We are currently using FDM version 4.9.179 and TDM Portal version 4.9.335
FastDataMasker-18.104.22.168.zip Download and verify that this resolves your issue.