We have SharePoint 2013 On-Premise. I am setup External Content Type which connects to a table in SQL database. An External List has been setup correctly in SharePoint 2013 designer which displays data from this SQL Table. The connectivity to SQL table from this external list is working correctly. I have another list which needs to update this external list via a simple workflow action. This is where I receive this "The workflow could not update the item in the external data source. Make sure the user has permissions to access the external data source and update items." error. Now all the permissions are setup correctly on the SQL table, SQL database, Set Object permissions (in BCS) and Set Metadata Store permissions. Secure Store services is also working correctly. Still no luck updating the External list from workflow.
Any hint, suggestion or has anyone resolved this