Not all documents are posted through to Accounting - see long text

What causes this issue?

The system is attempting to carry out the following activities:
Calculate the required accruals and - if you want to carry out
processing in an update run - to store the result in the Accrual Engine
as Accrual Engine documents in table ACEPSOIT.
Post these documents on from the Accrual Engine to components in
Accounting (such as Financial Accounting or Special Ledger).

System Response

Errors have occurred during processing.
The errors occurred in step number 2 (see above).
If processing was started in an update run, the following applies:
The Accounting documents with errors will not be updated.
For these documents, the first processing step ran without errors.
This means that processing does not have to be started again from
scratch.
You have the option of transferring the affected Accrual Engine
documents to Accounting manually.

How to fix this error?

If processing was started in an update run, you have the following
alternatives:
In the application menu, choose the function Transfer Accrual Engine
Documents to Accounting.
If you cannot find this function in the application menu, you can run
report ACEPS_POSTINGS_2_ACC_TRANSFER to transfer the Accrual Engine
documents in question to Accounting.
In some applications, you can call up the "Transfer Document to
Accounting" function from the context menu by clicking on the
right-hand mouse button. Before clicking the mouse, you have to
position the cursor on the Accrual Engine document in question.

Error message extract from SAP system. Copyright SAP SE.