Get Error 8500 With My Script

[agh6200]

when i run my script on sample png file i get following error:

Code: Select all

Error 8500: The requested property does not exist.
Line: 609
->  var list = docDesc.getList(stringIDToTypeID("histogram"));

how can i fix this error?
please note that this script written by my friend and it working fine in my friend PC but above error is received on other PCs!
please run following script on attached PNG sample file only.
https://drive.google.com/file/d/1aYQTyK ... mhw4GlshEm