BRTOOLS move datafile ORA-01012

Dear SDN,

I have installed a mySAP ERP 2004 on Windows with ORACLE 9.2. I want to move several datafiles to another partition. I have started brtools and have done the steps from help.sap.com. But when I try to execute, there is a sql error :

BR0301E SQL error -1012 at location BrCtlCopy-1

This error means, that the control file of the original datafile cannot be copied. There is a message "ORA-01012: not logged on". Does it mean I have not the right user and password to execute? I have read that brtools is logged on with 'sysdba' by default.

I have also checked whether I have got permissions on the filesystem or the size of the datafile, but everything is right.

Any suggestions?

Thanks

Frank Sonnenberg