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Manoj DegaManoj Dega 

“SerialBatchApexRangeChunkHandler” Opeartion while Running Batch Class

Please Help me. I Got this Error Message while Running Batch Class

Delete failed. First exception on row 0 with id 00P17000000OaUNEA0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, AttachmentActions: execution of AfterDelete caused by: System.DmlException: Update failed. First exception on row 0 with id a0H17000000

Thanks in Advance, Manoj
ShashankShashank (Salesforce Developers) 
We need to look at the code to understand why this exception is happening.