Thanks for your reply but it did not work for me. I made this change on the database server and 'reloaded' the listener.ora file.

But I am still getting the errors as follows:

(from sqlnet.log)

***********************************************************************
Fatal NI connect error 12535, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=XX.XX.XX.XX)(PORT=1527))(CONNECT_DATA=(SERVICE_NAME=SVCNAM E)(CID=(PROGRAM=C:\WINNT\System32\inetsrv\inetinfo.exe)(HOST=SVRNAME)(USER=USRNAME))))

VERSION INFORMATION:
TNS for 32-bit Windows: Version 8.1.7.0.0 - Production
Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 8.1.7.0.0 - Production
Time: 04-SEP-2002 18:37:08
Tracing not turned on.
Tns error struct:
nr err code: 0
ns main err code: 12535
TNS-12535: TNSperation timed out
ns secondary err code: 12560
nt main err code: 505
TNS-00505: Operation timed out
nt secondary err code: 60
nt OS err code: 0


***********************************************************************
Fatal NI connect error 12541, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=XX.XX.XX.XX)(PORT=1527))(CONNECT_DATA=(SERVICE_NAME=SVCNAM E)(CID=(PROGRAM=C:\WINNT\System32\inetsrv\inetinfo.exe)(HOST=SVRNAME)(USER=USRNAME))))

VERSION INFORMATION:
TNS for 32-bit Windows: Version 8.1.7.0.0 - Production
Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 8.1.7.0.0 - Production
Time: 05-SEP-2002 03:58:00
Tracing not turned on.
Tns error struct:
nr err code: 0
ns main err code: 12541
TNS-12541: TNS:no listener
ns secondary err code: 12560
nt main err code: 511
TNS-00511: No listener
nt secondary err code: 61
nt OS err code: 0

Could enabling tracing on the client help?

Could the encryption / security features on the client/server be affecting this?

It would be a tremendous help if you could advise me something to remedy this.

Thanks a lot.

TO

[Edited by TO_raptor on 09-05-2002 at 09:42 AM]