Error "No tnsnames entry found for instance 'instance_name' - SQL no executed" when trying to kil (4302420)

Attempting to kill a RAC session from Session Browser, but receive error:

"No tnsnames entry found for instance 'instance_name' - SQL no executed"

No entry for the individual RAC instance is recorded in the tnsnames.ora

Add entries for each RAC instance in the tnsnames.ora file:

Example:

RAC, two nodes

tnsnames.ora:
RAC_FGL1 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node1)(PORT = 1521))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = RAC)
(INSTANCE_NAME = ins_name1)
)
)

RAC_FGL2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = node2)(PORT = 1522))
)
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = RAC)
(INSTANCE_NAME = ins_name2)
)
)