D/C-Code does not fit to sign of amount in some items

See assistance documentation Journal Entry - Post (Asynchronous)

..

"This work supports antagonistic posting connected header level. Negative posting tin beryllium acceptable if DebitCreditCode doesn't motion disconnected the magnitude successful each items. If immoderate items are signed disconnected and others not, an mistake connection is issued."

See besides referenced successful Journal Entry

The service Journal Entry - Post (Synchronous) (JournalEntryCreateRequestConfirmation_In) supports antagonistic posting connected header level. You indispensable capable successful the DebitCreditCode for each items. If you bash this partially, an mistake connection is issued.

If the magnitude is positive, you indispensable set DebitCreditCode to 'H'. If the magnitude is negative, you indispensable acceptable it to 'S', arsenic illustrated successful the illustration codes below. The point is past marked arsenic antagonistic posting.

See Blog - Guidelines for API Journal Entry – Post, the pursuing constituent is made connected however to make antagonistic postings via API: 

5.9 Consulting astir Negative Posting

The JE Post API supports antagonistic posting connected header level. To alteration antagonistic posting, you must capable successful the DebitCreditCode for each items. If the magnitude is positive, you indispensable set DebitCreditCode to 'H'. If the magnitude is negative, you indispensable acceptable it to 'S', arsenic illustrated successful the illustration codes below. The point is past marked arsenic antagonistic posting.

If you bash this partially, an mistake connection ‘D/C-Code does not acceptable to motion of magnitude successful immoderate items’ is issued.

See besides kba 3464123 Troubleshooting APIs for General Ledger Accounting
Ensure you afloat trial connected your trial strategy anterior to implementation connected accumulation to guarantee nary antagonistic impact.