Hi
Has any bodyever encountered this problem before?
Ora: -12538:TNS:no such protocol adaptor.
I could not find it under the error messages on documentation.

I tried to log on(through SQL*PLUS) to my NT machine running oracle 8i(8.1.5) and I had this message ORA-12538:TNS:no such protocol adaptor. This is exactly what I did:
e.g.
USERNAME.....................
PASWWORD..................
HOST STRING...............
Ora: -12538:TNS:no such protocol adaptor.

I logged on as system,sys,internal with all the right passwords but I kept getting the same error message.

I went to the dos prompt in attempt to get to the sever manager but that also did not help. This is exactly what I did at the dos prompt:

c:\>set oracle_sid=dbname
C:\>svrmgrl
The name specified is not recognized as an
internal or external command, operable program or batch file.

Can anybody tell me what's going on here?

thanks,
charity