Thank you for your reply... in the end I decided to uninstall all the extensions and then re-install (as well as delete my config folder)... fixed this error but for some reason when I try and run now (Mac) it crashes and closes before completes
As a result I tried on 2 other computers ... and succeeded on a machine running the 2015 version of dreamweaver which i had not updated yet...
Seems eCart may have a few issues with cc 2017
Hopefully we can expect some updates soon?
Anyway.. thanks for your input.