Add-On Data Conflict when Loading or Linking Files

When you try to load or link a file into a Revit model, the Add-On Data conflict message displays.

Issue

Schemas are data structures defined by an add-on for storing data in the model's extensible storage. These data schemas may be stored in the model, a family, or in a linked model. Schemas should have unique IDs. This issue generally occurs when a vendor creates a new schema without making a new unique ID.

The file being loaded contains add-on data in a schema. The Revit model contains a schema that has the same ID as another schema being used in the current Revit session. If the file is loaded, only one of the conflicting schemas will be retained. The other schema will be removed. This may cause data loss or unexpected behavior in the related add-on.

Solution

1. Close Revit.
2. Relaunch Revit .
3. Open the model you were trying to open or link when you experienced the Add-On Data conflict.

This resolves the issue when the conflict is between data in memory and the model being loaded. If the problem persists, the conflict is between the model and on of the links. Use the following process to resolve the issue with linked files:

1. When you encounter the Add-On Data conflict message, click "Continue loading the file". To open, link, or reload the file.
2. Unload all of the links from the model.
3. Individually open each model that was linked when you experienced the Add-On Data conflict.
4. When you encounter the Add-On Data conflict message, click "Continue loading the file".
5. Save the file.
6. Repeat steps 3-5 for all the models open or linked when you experienced the Add-On Data conflict.
7. Reload the links into the model.

Note: This may cause data loss or unexpected behavior in the related add-on.

In the future, be sure you are using the most recent versions of Revit and any 3rd party tools you are using, or was used to create the file causing Add-On Data conflict.

If the problem continues, contact the vendor of the add-on.