SAP Paging overflow when storing data in the ABAP

Hi

After completion of SNP run in APO, when all receipt elements are getting transferred to ECC, we are getting error SAP Paging overflow when storing data in the ABAP' and all records (today it is almost 20000 records) are showing in Outbound Queue in APO.

Please suggest the possible steps to solve this error.

Thanks in advance.

Kind regards

Pradipta Sahoo