BTE are supported by service function modules OPEN_FI_PERFORM_* and OUTBOUND_CALL_*. Therefore you may run your transaction in debug mode and set breakpoints when function modules are called. Check for the names of the function modules called.
You may also search for SAMPLE_INTERFACE_* function modules.
Additionally you may open the application program (find the name via system – status – program when you have started your transaction). With global search for the strings mentioned above you may find whether BTEs are available with your transaction.
Another way is to check the documentation in the implementation guide (transaction SPRO).
Further you may use the menu “Environment” of transaction FIBF: there are 2 Infosystemes available, one for P/S and another for Process BTEs.
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