Exception on api function 'RebarFreeFormAccessor'

[sizy458]

Hello when i call api function "RebarFreeFormAccessor" on  a free rebar , then i have exception

"This RebarFreeFormAccessor Rebar doesn't contain a valid server GUID"

when i call api function 'GetShapeDrivenAccessor' on a free ,then  i have exception :

Autodesk.Revit.Exceptions.InvalidOperationException: This method applies only to shape driven rebar

I want read computedrivings curves , how do i do ?

Thank.

[sizy458]

I have exception when i call method 'GetCustomDistributionPath' from class object 'RebarFreeFormAccessor'

[MiguelGT17]

Same Doubt, any clue so far?