ORA-06413 "Connection not open"

Why can I successfully connect to Oracle 7.3 with plus33w running from any NT4.0 command window (not necesesarily
the oracle home\bin) but not from any shortcut or from the Programs, Oracle for Windows NT,SqlPlus item?

the trace file (level 16) is:
nnfotrv1: translated "jasramius.world" to (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (COMMUNITY = tcp.world)

(PROTOCOL = TCP) (Host = ramius) (Port = 1521)) (ADDRESS = (COMMUNITY
= tcp.world)

(PROTOCOL = TCP) (Host = ramius) (Port = 1526))) (CONNECT_DATA = (SID
= demo)))
osnqrn: Inserting IPC address into connect descriptor returned from nnfsn2a().
onstns: osntns: setting up interrupt handler... -<ERROR>- onstns: Couldn't connect, returning 6413 onstns: exit

                and log file is:
Fatal OSN connect error 6413, connecting to:  (DESCRIPTION=(CONNECT_DATA=(SID=demo)

(CID=(PROGRAM=C:\WINDOWS\Profiles\All Users\Start Menu\Programs\Oracle
for Windows NT (Common)\sqlplus.lnk)

(HOST=Windows NT

PC)(USER=sandersj)))(ADDRESS_LIST=(ADDRESS=(PROTOCOL=ipc)(KEY=jasramius.wo rld))

(ADDRESS=(COMMUNITY=tcp.world)(PROTOCOL=TCP)(Host=ramius)(Port=1521))(ADDR ESS=(COMMUNITY=tcp.world)

(PROTOCOL=TCP)(Host=ramius)(Port=1526))))

  VERSION INFORMATION:
        TNS for 32-bit Windows: Version 2.3.2.1.0 - Production   Time: 09-JUL-97 16:30:42
  Tracing to file: c:\orant\network\trace\tracenet.trc

Oerr is real helpful:
ramius% oerr ORA 06413
06413, 00000, "Connection not open."
// *Cause: Unable to establish connection. // *Action: Use diagnostic procedures to ascertain exact problem.

Could anyone please tell me what this 6413 means, and why it couldn't set up the interrupt handler? I will
be eternally grateful.

-cheryl (kapecc_at_cayennesoft.com)

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