Create a Distribution Model for the Partner and Message Type with SAP System 4.5 or Earlier
If you are using SAP system 4.6 or earlier, you can use BD64 or alternatively, the following procedure:
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To use SAP system 4.5 or earlier to create a distribution model
1. In the Main screen, select Tools > Business Framework > ALE > Customizing.
2. Open the Cross-Application Components folder, then the Distribution (ALE) folder, then the Distribution Customer Model folder in the tree view.
3. Select Maintain customer distribution model.
4. Create a new model using Model > Create.
5. Add a message type to your model, enter the sender in the dialog box (for example:, CERCLNT800), enter the receiver (your logical system), and the message type (MATMAS).