Problems for saving descriptions in infotype 1002

Hello masters:

I'm trying to save descriptions in infotype 1002. I'm using FM RH_OBJECT_DESCRIPTION_WRITE to do it.

This function works fine when I save the first description for a particular subtype. However, when I try to save another description for the same subtype, it isn't saved.

On the other hand, I can save the descriptions with the same subtype using tranx PP01 (so the problem is not the subtype).

Does anybody know what could be happening?

Thank you.