IBM SC33-1683-02 - Manual (Page 515)

specific TOR within the CICS generic resource group, you must specify LUNAME
as the member name—that is, the CICS APPLID, as in the first example.)
Note that, if the system that issues an ISSUE PASS LUNAME(grname) command is
the
only CICS currently registered under the generic resource name (for example,
the others have all been shut down), the ISSUE PASS command does not fail with
an INVREQ. Instead, the terminal is logged off and message DFHZC3490 is written
to the CSNE log.
You may want to code your node error program to deal with the situation when
message DFHZC3490 (DFHZNAC error code X'C3') is issued.
the node error program and generic resources
Chapter 9. Writing a node error program 483