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Redacted
Previously discussed at https://www.daz3d.com/forums/discussion/172466/getfirstfolder-return-null with no solution posted.
If it is a bug, it may not have been reported yet; if there is just a missing step, I did not see it with a quick glance through the documentation.
You will notice that there are no version dependencies in http://docs.daz3d.com/doku.php/public/software/dazstudio/4/referenceguide/scripting/api_reference/object_index/contentfolder_dz - the API is as it was initially, nothing has been added or taken away. Indeed, the DS 3 scripting is the same. That doesn't necessarily mean Omniflux is wrong, but it isn't a deliberate change and the methods you cite are not new.
A fix for this is coming in DS 4.20.0.3+
Comments
Previously discussed at https://www.daz3d.com/forums/discussion/172466/getfirstfolder-return-null with no solution posted.
If it is a bug, it may not have been reported yet; if there is just a missing step, I did not see it with a quick glance through the documentation.
Redacted
You will notice that there are no version dependencies in http://docs.daz3d.com/doku.php/public/software/dazstudio/4/referenceguide/scripting/api_reference/object_index/contentfolder_dz - the API is as it was initially, nothing has been added or taken away. Indeed, the DS 3 scripting is the same. That doesn't necessarily mean Omniflux is wrong, but it isn't a deliberate change and the methods you cite are not new.
Redacted
A fix for this is coming in DS 4.20.0.3+