When generating a register via the IBM Rational Build Forge Perl API and applying data to the register, the date is surrounded by "[BINARY]xxxx0[/BINARY].
This has been identified as a product defect under APAR PM65866.
Resolving the problem
The defect has been resolved as of Build Forge 18.104.22.168.
Rational Build Forge 22.214.171.124
Use Build Forge Java API to create project registers, where issue is not seen.