SAP Function Module search on AD04
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AD04_COSR_WRITE - Update module for AD04CSFx
AD04_RETRIEVE_OLD_COND_VALUE - Retrieve old value of a condition via table AD04RELCON
AD04_UPDATE_CONTRACT - Update contracts/orders with voucher number
AD04_VOUCHER_NUMBER_CHECK - Check voucher number in case of cancellation
AD04_VOUCHER_NUMBER_GET - Get voucher number from contract/order
AD04_VOUCHER_NUMBER_UPDATE - Updating contracts/orders with the last assigned voucher number
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