@jkabot If I don't use

throw

the record is save... if I use throw even with error module:

throw mError('You are not allowed to change the vendor if the PO was already received!');

You can use error.create though. There is no doubt that it will work.

It does not work, check the sample code few lines above...

I went off hook just hearing that. But I did encounter some problems with Chrome. So that explains how it works in FF and not in Chrome.