Hallo folks!

Environment:
Oracle Client: Win2000
MS SQL-Server: 2000 running on the Oracle Client
Oracle-Server: Linux
Oracle DB: Oracle 8.1.7

My Task:
Create a Server Model by capturing a design from my
Oracle DB. - I want to import the objects of one user in a
new Server Model

My Problem:
When I try this by doing the following steps:
1. Oracle Designer/ Designer Editor/ Tools/ Database
Navigator
2. connecting through the user his objects want
3. highlighting the tables I try to import in the server model
4. draging the tables to 'Relational Table Definitions'

A) I got warning messages while importing the information.
One example of the messages (I got two for each object I want to import):

CDS-15317 Warning: invalid Tablespace reference
('NETSHOP') in in table 'SHIPINGMETHODS'
- ignored
CDS-15319 Warning: invalid Tablespace reference ('SYSTEM') in User Object Index Storage
for 'SHIPINGMETHOD_PK' - ignored

B) I can not save the model. Error message here is:

Message
-------
RME-00531: Lock failed: Element does not exist

Cause
-----
An attempt was made to lock an element that was
deleted by another user.


Action
------
Cancel and retry operation.


Message
-------
RME-00504: Failed to lock 'TBI' with ID '862109472167264402515666320524078509'

Cause
-----
Element lock request failed.


Action
------
Examine other reported errors for specific details.

I do not know the mentioned Object! Do you know a possible solution for this problem? Has anybody had this problem before? It would be very nice If you would give my any advice! Thank you in advance!

Christian