AR-Invoice status Posting , User neither can post it nor can delete it

AR-Invoice status Posting , User neither can post it nor can delete it

If at the time of AR - Invoice entry , If user cant post the invoice or cant delete it and status of that invoice showing posted tehn follow below steps :- 

System Management > Rebuild Process > Upgrade mass Regeneration > Conversion Workbench > Auto run conversion > Select , Unlock transaction with No entry in RJ 

Please flow above steps to resolve the above error ...