Revit API / Dynamo: Support WriteAccess to InstanceParameters of Nested Families

[pmondry]

When accessing an instance of an family hosting nested families, its no problem to access the instance parameters of the nested family instances  (via Revit API or Dynamo). 

But SetParameterValues (dynamo) or SetValue (API) on an instance parameter of a nested family always results in message that paramater is read-only.

Parameter should be modifiable or in short "get rid of readonly flag", as long as the parameter are instance parameters, not associated with a parameter of the hosting family already. 
This would enable to change the values of instance parameters of different instances of same family type to different values.

Note: Would users of Revit UI enable to change instance parameters of this type of families in schedules as well.

[c_keimes]

If I understand the issue correctly, my concern is exactly the same. The fact that schedules in Revit, and the revision list in particular, are very unintuitive is a topic in itself.

To work around this, I tried to develop a Dynamo script that allows me to export the revision list to Excel, edit the entries there, and then import them back into Revit. While this workflow works perfectly for title block parameters, I can only export the revision list to Excel but cannot write the data back or overwrite it due to the 'Read-Only' error.

The 'Issued' checkboxes are all unchecked, and I can manually adjust the revision date within the Revit UI—it is just not possible to do so via Dynamo/API.

In our daily workflow, the majority of our time is consumed by organizational and repetitive tasks, such as document transmittals and all the associated preparation and follow-up. It would be an enormous help if these organizational processes could be optimized through more intuitive schedules or by removing the 'read-only' restriction on parameters that are manually editable in the UI.

This limitation creates a significant bottleneck in BIM management.