Once you set the part as a Toolbox part the freeze bar disappears!
This is the solution to get the freeze bar back if the part is a toolbox part.
1, C:\Program Files\SolidWorks Corp\SolidWorks\Toolbox\data utilities and run "sldsetdocprop.exe"
2, select the "Property state: No"
3, select "Add Files" and add the part document that you want to see the freeze bar on
4, Select Update Status
5, Select Close
Your freeze bar will be restored to the part document!
Don't forget to re-run "sldsetdocprop.exe" to return the part to a Toolbox part.
select the "Property state: Yes:" and steps 3 to 5. (important if you use a vault system).