Unable to clear customer through F-32

We just went live today with our FM (BCS) Module. Everything is fine except when people is trying to clearing customers through F-32

We have the "No commitment itme in line 0001 xxxx xxxxxxxxxxx 2014" error when try to post the clearing document.

We have activated the trace in FMDERIVE but, the error shows up without even entering in the derivation strategies we set. It looks like some configuration is missing or maybe we have to run some transaction in order to add the commitment item to these documents?.

We have tried to execute transaction FMN0 for these documents but system says the document is correct.

Any ideas?

Thanks and regards, Mauro B.