Hello BK,
The above mentioned error is a known issue due to tablespace error in the earlier versions of SCM 7.0 software. Perhaps, it has not been extended to new Support pack. You can raise a SAP Incident ticket requesting them to upport the note to the new version.
As a workaround, what you can do is to provide a new name to the ODL instead of using the name with which you're trying to save the ODL. This will solve the issue temporarily.
Regarding the "Obtain Confirmation" ODL type, I hope you selecting the first two check boxes in the 3rd tab of filter is able to pick the fully confirmed items as well and that should suffice your requirement. But, what is more interesting is you're using this report to see how BOP sorts the items. Can't that be done directly within the BOP ? For instance you can run a simulation BOP to see how system is sorting the data ? Or you could also try to see the worklist of items from BOP as well. Right ?
Hope this helps
Thanks & Best Regards,
Babu Kilari