SAP Message RSAR501 - No connection to system & possible

Diagnosis
Logical system &V1& cannot be accessed.

System Response
V2 v3

Procedure
Use transaction SM59 (for BAPI and SAP source systems) or DBCO (fordatabase source systems) to check the RFC parameters of source systemV1. also check whether the system can be accessed in the network andwhether the necessary application and system programs have beenstarted.

581273Correction: router strings with a source system connection