I have got same issue at Info Object level in BW 7.3.
Issue: All my info objects, transformations and DTPs are inactive state because of Q to Pre production system copy
Solution:
1. Activate info object through program in SE38--> RSDG_IOBJ_ACTIVATE
2. Delete existing master data with SIDs
3. Activate Data source through program in SE38-->RSDS_DATASOURCE_ACTIVATE_ALL
4.Extract data to source successfully without error message "
Data target 'XYZ" removed from list of loadable targets; not loadable"
5. Activate Transformation through program in SE38-->RS_TRANSTRU_ACTIVATE_ALL
6. create new DTP
7. Extract data from data source to info object