Access of undefined property of masked object.

[tufantalan]

I have 2  same FLA files which created in animate 2018 & 2019. If I publish 2018 file there is no compiler error. But If I publish 2019 file it gives 1120: Access of undefined property of object. The animations contain masked objects with layers. Do you know solution about this problem? 

[kglad · Accepted solution]

advanced layers should be the same in the problematic fla.

(modify>document>untick or tick 'use advanced layers').

info about advanced layers: https://helpx.adobe.com/animate/using/timeline-layers.html#advanced-layers

[tufantalan]

Thanks for reply. The problem is solved.

[kglad]

you're welcome.