I've used the Persistence > Set Session Value behaviour to create a session ID whose value is the unique record ID from the recordset on my Update form page.
I'm still curious as to why "Save id in session as" isn't available for the MySQLi Update Record behaviour though.
Adding the Persistence > Set Session Value behaviour has caused these errors to resurface though:
Warning: Unknown: open(\\VHOSTS3SHARE01\expressphpsessions$\sess_99ut17r8hsc3nffiabkvfu3qr2, O_RDWR) failed: No such file or directory (2) in Unknown on line 0
Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (\\VHOSTS3SHARE01\expressphpsessions$) in Unknown on line 0
Which is, according to our host, a scripting issue which makes sense because this error only appeared once we added the Persistence > Set Session Value behaviour to our page (select the option from the Edit News button dropdown):
Hope you can resolve this for us. Thank you.