The raw data was transferred to a customer-specific table in the target SAP system using a tool developed to automatically fill the table fields from the legacy system file. In the next step, the mapped data was transferred to the second table. During the transfer, the data was checked for accuracy. The data stored in the second table was marked with a flag to indicate whether the mapping and data check were successful, which allowed targeted error handling. In the third step, the SAP objects were created: Master data such as customers, goods recipients etc. and transaction data such as sales orders, contracts etc. The results of the creation were written back to the second table and assigned a processing indicator. The SAP objects were created using standard BAPIs or, if no suitable standard SAP objects were available, using batch input.