SAP Message 6G007 - Error occurred when connecting to system &

Diagnosis
A transaction was supposed to be called in system &V1&.
The R/3 connection &V1& was chosen.

System Response
An error occurred during the remote call of the transaction.
The transaction cannot be called.

Procedure
Check the R/3 connection &V1& using Transaction SM59. Test if theconnection to system &V1& is successful.