BAPI_ACC_DOCUMENT_CHECK Commitment item error

hello ,

not sure if this is the right place for ask this question but if not please move the question sorry and thanks in advanced.

my problem is that i am using the bapi BAPI_ACC_DOCUMENT_CHECK to check if is posible post first using BAPI_ACC_DOCUMENT_POST , but BAPI_ACC_DOCUMENT_CHECK is give me a errror :

Commitment item EDCP/0000//1130100102 does not exist

this look like a config error but if i try do a posting using fb01 i can do the post right using the same value that i pass in the bapi,

any clue i can check or is in fact some config is missing ?

thanks again