000499: Table is not editable.
Description
The tool attempted to modify the input dataset and failed. This error can occur for the following reasons:
The data format is not editable.
The operation is not supported by this implementation.
For example, making changes to table schema is not supported for nonhosted feature services (referencing enterprise geodatabase data).
The table is in an edit session.
The table is currently participating in a join.
The dataset is locked by another application and cannot be modified.
The tool modifies the schema of the dataset (either adds, deletes, or updates fields), but you are not the dataset owner.
Solution
Do any of the following:
If you're performing operations on the data, convert the data to an editable format, such as a geodatabase or shapefile.
If the data is in an edit session, close the edit session and run the tool again.
If the data is participating in a join, remove the join and run the tool again.
If the data is being used by another application, close the application, and run the tool again.
If the dataset is in an enterprise geodatabase, connect to the database using an account that owns the table to be modified.