SAP Note 629170 - VSR: User exits for Public Sector France

Hi Experts,

We have errors in the substitution user-exits for Public Sector France and we have implemented OSS 629170. However, we only implemented it for the substitution form since the validation form is not giving us error messages in transport execution. After implementation in substitution form pool, we no longer encounter the errors upon transport execution. Is this correct? or do we still need to implement it in the validation form pool even when there are no errors for validation.

Also, we'd like to know what is the use of program RGUGBR00? What does it really do?

Thank you.

Regards,

Kath