Overview:
Vault Loader returns with the following error when updating a document field: non-editable property specified.
Root Cause:
The document field that the user is trying to update has the Default security set to Read Only
Solution:
The user would either need to change the Default Security, enter an override for the user/group, or use the configured methods for updating the field (typically this will either be a workflow, custom user action, or state change).
Related Documentation:
Vault Help Documentation: