ERROR IN CREATING TRUSTED SYSTEMS

Question

Dear Gurus,
When creating the trusted systems between to sap systems, we are getting the below error.
"No authorization to log on as a trusted system (Trusted RC=0)."
We created the trusted system entry in SMt1 and the RFC check is working fine(both test connection & authorization test).
Even i am able to login to the remote system. But when i check the system in SMt2, i get the above mentioned error.
Could you please let me know on how to resolve the above error.
Thanks & Regards
Surendranath

Answer 1

Hi,
Trusting Transaction SMT2                                                     
The trusting transaction SMT2 (or SM59 ® RFC ® Trusting Systems) constructs a list of all trusting systems that have been established for this trusted system. Here, a logon and authorization check for the current user and client is performed, using the destination TRUSTING_SYSTEM@S00 that has been automatically created.       
This basically corresponds to transaction SM51, if you use Remote Login to perform a logon on a different application server.                                                                               
If problems occur while setting the destination TRUSTING_SYSTEM@S00 (such as host name or service information), you either have to create a new destination for your needs, and then enter the host name or service information using SAP router strings, or adjust the network settings of the server. To correct the problem in transaction SMT2, you have to adjust the network configuration of the server. As this transaction is only to be used for test purposes, in this case you could also choose to ignore the error.                                                               
To perform a logon as a different user or client, you have to create a new RFC destination with a trusted option set.                                                                 
In this scenario, the following error text in SMT2 can be ignored:
No authorization to log on as a trusted system (Trusted RC=0)
If the host name contains the character '_' (as in "my_host"), then the generation of the related trusting system destination may lead to incorrect settings. This problem can be corrected by implementing Support Package SAPKB46D09 (see below). For earlier releases, the changes required to correct the problem can be made manually.
Continue with:
Configuring System Resources for Parallel RFC, tRFC, and qRFC
Rgds,
Suman