I recently upgraded 4 databases from 816 to 817.
Two of the databases are only used/opened when I upgrade my clients database, so that i have a match database at my office.

This is the first time since the upgrade that I'm trying to startup one of the databases.(I do have a full backup of db)

This problem was previously mentioned on the forum with no solution
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C:\>SET ORACLE_SID=DBTEST

C:\>SVRMGRL

Oracle Server Manager Release 3.1.7.0.0 - Production

Copyright (c) 1997, 1999, Oracle Corporation. All Rights Reserved.

Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
With the Partitioning option
JServer Release 8.1.7.0.0 - Production

SVRMGR> CONNECT INTERNAL
Connected.
SVRMGR> STARTUP PFILE=H:\oracle\admin\clientDB\pfile\INITclientDB.ORA
ORACLE instance started.
Total System Global Area 106612764 bytes
Fixed Size 75804 bytes
Variable Size 76369920 bytes
Database Buffers 30089216 bytes
Redo Buffers 77824 bytes
ORA-12709: error while loading create database character set
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Can anyone assist me in this problem.
Thanx in advance.