Clearing restricted to 9999 items to be cleared

What causes this issue?

In a clearing document, you can only post or clear a maximum of 9999
business partner items. In this case however, you want to clear more
than 9999 items.

System Response

The clearing proposal was automatically restricted to 9999 cleared
items. In the case of an incoming payment, the remaining open part of
the payment would be posted on account.

How to fix this error?

In order to complete the clearing, restart the automatic account
maintenance if necessary. For manual processing, you have to break the
clearing down into smaller units that you can then process separately.

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.