SAP Message WS556 - A run with the name &1 does not exist (see long text)

Diagnosis
Documents that have already been processed are saved under the programrun name. If time is exceeded, or any other error occurs, you cancontinue processing, starting with the next document to be processed.Enter the name of the run, and deselect the 'New run' indicator.
As further selection parameters (e.g. vendor, purchasing organization)are not saved, you should store these in a variant.

Procedure
Check the name you entered and the New run indicator.