"a direct connection to this agent is not allowed"
*Cause: A user or a tool tried to establish a direct connection to either
an external procedure agent or a Heterogeneous Services agent,
for example: "SVRMGR> CONNECT SCOTT/TIGER@NETWORK_ALIAS". This type
of connection is not allowed.
*Action: When executing the CONNECT statement, make sure your database link
or network alias is not pointing to a Heterogeneous Option agent or
an external procedure agent.