Get PO Approval limit for Approver and substitute

Hello all,

Description:

When an approver assigns a substitute for approval, the PO Value Limit (HRP5503-LIMIT) for the position needs to be equal to or greater than that of the approver. If this is not true, then an error message saying u201CSubstitute has insufficient signing authorityu201D should be returned to the user upon adding the substitute.

Logic can be found in SAP program LBW02F01 (include)

under routine FORM / D1328_FIND_DEPUTIES

Here i need to fetch the PO approver details and substitute detaiils.

Please let me know about this.

Thanks in advance