Dear Mr. Knoeller,
Your SAP_BASIS SP and release would be helpful, both for SolMan and the managed system.
Until then, could you please check the following notes and KBAs, in this order:
1972114 - SYB: Error in DCF ownership transfer - should solve your issue in my opinion
1712802 - SYB: Change ownership of Data Collection Framework /
ATM
1623182 - SYB: Authorization issues in DBACockpit
In case this is a test system, if the mentioned notes do not offer you a propper resolution, I would also drop all the collectors (Framework Collecter would be the last one, of course) and reassign it to Solution Manager. This also depends on your NW release, SP and DBA Cockpit rellease.
Relevant notes regarding DBA Cockpit version known by me:
1757928 - SYB: DBA Cockpit Release Notes 7.02 SP11, 7.30 SP6, 7.31
SP2
1758182 - SYB: DBA Cockpit Release Notes 7.02 SP12, 7.30 SP8, 7.31
SP5
1758496 - SYB: DBA Cockpit Release Notes 7.02 SP13, 7.30 SP9, 7.31
SP7
1814258 - SYB: DBA Cockpit Release Notes 7.02 SP14, 7.30 SP10, 7.31
SP9, 7.40 SP4
Kind Regards,
Ionut