Hello Pooja,
This might be due to the incorrect values in export/import buffer parameters. Refer the below notes for the same.
520684 - Runtime error EXPORT_BUFFER_NO_MEMORY and system log message BYE
702728 - Profile parameters for export/import buffer instances
This has been already documented here:
Some of troubleshooting steps for Solution Manager 7.1 post installation
regards,
pavan