Withholding tax - error when creating a supplier BP invoice

Hi,

I setted up the whithholding retention management on X3 V12 (GESRTZ), created a new retention tax, marked the company for retention and associated the retention to the supplier.

When I create a new supplier BP invoice for that supplier, in the line it brings automatically the retention but at the end, when saving the document, it gives an error:

I´ve tried everything I know to solve this, validating screens, windows, tables, transaction and so on but whith no results.

Any help whowld be appreciated.