I run:

exp USERID=sys/<....>@avl owner=(avlsys,avlgeo, mdsys) FILE=avl.dmp ROWS=YES GRANTS=N 1>backup_avl.log 2>&1

and get:

Export: Release - Production on Thu Dec 21 10:35:17 2000

(c) Copyright 1999 Oracle Corporation. All rights reserved.

Connected to: Oracle8i Enterprise Edition Release - Production
With the Partitioning option
JServer Release - Production
Export done in WE8ISO8859P1 character set and WE8ISO8859P1 NCHAR character set
Note: grants on tables/views/sequences/roles will not be exported

About to export specified users ...
EXP-00010: MDSYS is not a valid username

Enyone can help/comment? (MDSYS is schema of spatial data objects, abbrev. SDO)

Thank you