Commitment item "Space" is not allowed (US Federal Payment Updating)

What causes this issue?

You are using the budgetary ledger for US Federal Government. This
requires Funds Management to update payment documents. A document line
without commitment items has been detected. This might happen, if you
use the Split Ledger (FI-SL Splitting) and you are not splitting and
balancing by commitment item.

System Response

The document cannot be posted.

How to fix this error?

Adjust your customizing accordingly and try to process again.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.