Solution : https://service.sap.com/sap/support/notes/1451869 (SAP Service marketplace login required)
Key words :
abap back-end server, sending e-mailsyou create, sending e-mails, cl_bcs=>send reason, prerequisites reasonthe symptom, sap reach compliance 1, 1 support package 04 product, 0 support package 01 import, latest support package, runtime error raise_exception
Related Notes :
1389578 | SAP PRC 2.0: Collection of corrections on the basis of SP00 |
1367151 | Release information note for SAP REACH Compliance 1.1 SP04 |