Script does not work anymore after updating to FM 12.0.3

Hi,

With TCS5, Robohelp would crash when importing FrameMaker books to RH, because the FM files had embedded graphics. So, I found a script to externalize the graphics before doing the import (the script is: ExtendScript of the week: Externalizing Graphics « TechComm Central by Adobe). However, this script is not working since I updated from 12.0.2 to 12.0.3. And without this script, we can't create HTML5 output!

Although I wrote a few simple scripts, this one is quite complex and would be difficult to debug. Anyone here knows what could have changed to make the script useless after such a small update? Or can update this script to make it work?

Thanks!