Please help to fix script that works perfectly on Ai 2015 but not perfect on Ai 2017

Dear all,

I have bellow script that i used on Ai 2015.

It's just for embed all linked images and no problem at all.

#target Illustrator

if ( app.documents.length > 0 ) { 

   while ( app.activeDocument.placedItems.length > 0 ) { 

  placedArt = app.activeDocument.placedItems[0]; 

  placedArt.embed(); 

   } 

}

But after I start to using Ai 2017, I got error as bellow. Not every time, but it happen a lot.

Is there anyone can help me to fix this?

I wish all of you have wonderful days.

Thank you.