Not able to do reindexing in TREX SES_ADMIN Transaction

Hi Team,

Trying to implement notification TREX Search using business object BUS7060.

Through SPRO-->SAP NetWeaver-->Application Server-->System Administration-->Search Engine Service, I have replaced the standard class with custom class (by adding more some TREX attributes). Request basis for indexing through SES_ADMIN Transaction.

Indexing was started but it consumed more time for that batch job. Latter we exchanged the custom class with standard class(to check performance)

But now we are unable to do re-indexing. system is throwing below error.

Business object BUS7060: Object of related class CL_ERP_SE_QMEL cannot be created

Please provide your suggestion to resolve the issue.

Thanks and Regards,

Manoj