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Data Transfer: Material BOMs 
The following process can be used to transfer material BOMs automatically from a legacy system into the SAP system.
You have decided to transfer material BOMs automatically into the SAP system.
When transferring the material BOMs, data from the legacy system is converted into a sequential data transfer file and then transferred to the SAP system using the following SAP data transfer program:
· Copying Material BOMs Without Long Text (report RCSBI010)
· Copying Material BOMs With Long Text (report RCSBI040)
· Copying BOM Changes (report RCSBI020)
Copying BOM Variants (report RCSBI030)
The data transfer file is the prerequisite for successfully transferring data as it contains the data in a converted format that is suitable for the SAP System.

You transfer material BOMs as follows:
...
1.
Identifying Relevant
Fields
2.
Analyzing the Transfer
Structure
3.
Creating a Sample Data
Transfer File
4.
Testing the Data
Transfer Program
8.
Preparing the Legacy
System
10.
Executing the Data
Transfer
The material BOMs are transferred into the SAP system.