If dialog users do not have the S_RFC authorisation and execute remote functions, the dump RFC_NO_AUTHORITY will occur.
You will see the following under the heading "Causes" in the dump:
User "XXXXXX" in client 000 attempted to execute function module "RFCPING" from function group "SYST", but does not have the relevant RFC authorization.
This means another system wanted to call the Function Module "RFCPING" of function group "SYST" via RFC connection with user XXXXXX but the user XXXXXX does not have enough authorisation. To solve the problem, the required authorisation object S_RFC (with authorisation for function group "SYST" in it) has to be assigned to user XXXXXX
If the authority check is enabled (auth/rfc_authority_check is at least 1) the users in the ABAP system need S_RFC authorisation to run a function module via RFC.
auth/rfc_authority_check, RFC_NO_AUTHORITY, dump, shortdump, parameter, define, recommend, value, BGRFC_USER, bgRFC , KBA , BC-MID-RFC , RFC , How To
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