R12:AP: View Invoice Approval History Gives APP-SQLAP-10000: ORA-06502: PL/SQL: numeric or value err

Dear Experts,

I have created Invoice and initiated for Approval. I have checked Reports-> View Invoice Workflow Approval History and the following error appears.

ERROR

-----------------------

APP-SQLAP-10000: ORA-06502: PL/SQL: numeric or value error:

NULL index table key value occurred in

AP_WORKFLOW_PKG.Get_All_Approvers <-APXIAWHS

with parameters (&PARAMETERS)

while performing the following operation:

set variables from workflow

and also invoice is not going for next level approvals. I have checked Oracle id 2452499.1. But same error coming. Is it bug or setup issue? Could please guide me.

Thanks in advance.

Thanks,

Vikram