Community
Thankyou for saving my sanity! This issue was slowly driving me mad!
1. create new rvt project with default (metric)/ (imperial).rte, level 1 (0.000) need only.
2. revit linked old rvt project file
3. binding linked old rvt project file with include component + level + grid
4. enjoy
5. ungroup from old project linked.
6. continuing with new project or create central file if need...