this error could appear on improperly installed ZModeler (missing or corrupt files). Additionally, it could be a result of misconfiguration of rendering device.
first of all, redownload zmodeler3.zip and unpack it into a different folder. make sure to run zmodeler3.exe "as Administrator". If you use Win10, it's preferable to run compatibility wizard and set compatibility to "Windows 7".
second, make sure to download and install this package: http://www.microsoft.com/en-us/download ... px?id=8109
This is a required DirectX 9.0c libraries. It will not downgrade your current DX installation, it will populate it with additional libraries only.
Finally, open "Settings" -> Rendering Device -> and ensure you set "Hardware@your_video_card". Press OK and restart ZM.
If still no luck, specify your video card details and video driver details.