Trusted RFCs are not working

In cases where Trusted RFCs are not working, the easiest solution is to delete the trusted relationship and re-build it. However, before doing that, please make sure that you have SAP Note 1491645 implemented in both systems of the trusting relationship.

In summary:

1. Delete the affected destinations in SM59 and SMT1.
2. Re-create the trusted relationship:

• Refer to SAP Note 128447 and the mentioned guide there:
  •   http://help.sap.com/saphelp_nw04/helpdata/en/8b/0010519daef443ab06d38d7ade26f4/content.htm 

• Alternatively to the Standard guide, you can use both wiki pages to re-create the trusted relationship:
  • http://wiki.sdn.sap.com/wiki/x/LILYDw
  • http://wiki.sdn.sap.com/wiki/x/JomLEg

NOTE: Make sure that user being used to re-create the trusted relationship has enough authorization. Even if user has SAP_ALL, notice that S_RFC and S_RFCACL authorizations are also required.

I hope this helps.

Best Regards,

Guilherme de Oliveira.