Thanks a lot pdreyer

You are right, I have modified the tempdb, but got the following error:
1> online database AdventureWorksDW
2> go
Database 'AdventureWorksDW' appears to be at an older revision than the present
installation; ASE will assess it, and upgrade it as required.
Database 'AdventureWorksDW': beginning upgrade step [ID 2]: validate basic
system type data
Database 'AdventureWorksDW': beginning upgrade step [ID 10]: alter table
(table syscolumns)
Msg 207, Level 16, State 1:
Server 'servername', Line 1:
Invalid column name 'status3'.
Msg 2705, Level 16, State 3:
Server 'servername', Line 1:
Column names in each table must be unique. Column name 'encrkeydb' in table
'syscolumns' is specified more than once.
Msg 2705, Level 16, State 3:
Server 'servername', Line 1:
Column names in each table must be unique. Column name 'encrdate' in table
'syscolumns' is specified more than once.
Msg 3461, Level 20, State 1:
Server 'servername', Line 1:
Database 'AdventureWorksDW': upgrade could not install required upgrade item
'10'. Please refer to previous error messages to determine the problem. Fix the
problem, then try again.
Msg 3451, Level 20, State 1:
Server 'servername', Line 1:
Database 'AdventureWorksDW': upgrade has failed for this database. Please refer
to previous messages for the cause of the failure, correct the problem and try
again.
Msg 3454, Level 20, State 1:
Server 'servername', Line 1:
Database 'AdventureWorksDW': ASE could not completely upgrade this database;
upgrade item 1501 could not be installed.
ASE could not bring database 'AdventureWorksDW' online.
The backup database is SYbase ASE 12.5. I want to restore it to ASE 15.0 develop server.
Could you tell me how to solve it?
Thanks^_^
Winnie