Apex 5.1.4
DB 12.2
Using the wizard Two Page Master Detail i Created a summary and a details page with a form and an IG. Both master an detail are based on a view. I use my own PLSQL processes to handle the DML, when an exception is raised in this procedure i will get the useless message " Error: SyntaxError: Unexpected end of JSON input" .
I do have an error_handler in place which is called according to the debug log. Also using apex_error to set an error does not work.
I believe this behavior has to do with the property 'Reload on Submit' when set to "Always" everything works as expected, however the IG region will not allow this setting. So the only work around is using validations to validate unique keys and check constraints, which means adding redundant code to my application.
Any other suggestions