Problems of "General Error"

Hi all, i'm lookin for an explanation of a problem that we have in an development, we made a new window that will make the deliveries for reserve invoices via di api,

My problem is that we made this development testing in a DB already in production from another client, and it works,

Now that i'm testing with the new DB of the client, when i try to make a delivery associated to the reserve invoice:

oDespacho.Lines.BaseEntry = DocEntry

oDespacho.Lines.BaseLine = Z3 - 0 for the first line

oDespacho.Lines.BaseType = SAPbobsCOM.BoAPARDocumentTypes.bodt_Invoice

It just throws "General Error" and i can't make the delivery,

If i do this process without the association it makes a delivery not associated with the invoice but it works, i checked all the accounts of the item, trying to get it equal with another item of another client and the accounts need to make the reserve invoice, then what's wrong?

Any bug? because if i make this process standard in this new DB, it makes the delivery associated with the reserve invoice, i don't know what else can i try about this,

Any suggestion will help, Thanks,

Gabriel