3401781 - Error Message "Output request could not be executed; request is out of date"

While sending customer invoices, getting below error message:

• Output request could not be executed; request is out of date

Choose Details, message shows: 

• Contact your key user to investigate this error. When the error has been solved your key user should inform you so that you can retry outputing the document.
  /DOC/OM_ERR024

SAP Business ByDesign 

1. Go to Customer Invoicing work center.
2. Navigate to the Invoice Documents view.
3. Select any Invoice and Edit it.
4. Navigate to the Output History tab, Status as Error.
5. Click Error hyperlink, it says: "Output request could not be executed; request is out of date".

The error message '/DOC/OM_ERR024' seems bgRFC delay time is exceeded when processing the DOR Output.

This is the expected behavior for the error message '/DOC/OM_ERR024'.

In this case, Output Request must not be executed. Use the retry option for the invoice document so that the Output Request will be re-triggered. If this is no other issue, the output status will change to successful.

Output request could not be executed; request is out of date, /DOC/OM_ERR024, Contact your key user to investigate this error. When the error has been solved your key user should inform you so that you can retry outputing the document. , KBA , AP-RC-OUT , Output Management , AP-CI , Customer Invoice Processing , Problem