Model target can't display guide view 2D

Hi
As title mentioned about, when i export official sample apk,it runs good on my andriod phone,the guide view 2d can dislplay whether i use custom image or not,like followed shot image.
but when i use custom database,it can't display Guide view image,i already add a license key,so i don't know deal with this situation.
thanks

 

this is my custom model target

 

What versions of Unity, Vuforia, and the Model Target Generator are you using? Are you seeing this on Playmode, device, or both? Do you see any errors or other messages in the console?

 

hi：
thanks reply for me, this is mtg version, this is unity version,and on PlayMode whether sample or custom don't display guid2d image,but on devices samply can display guid2d image,but custom can't ,there no any errors upon in unity editor.I doubt that if my license key used wrong. this is my license usage,it can't support model target.

 

hi：
I want to just test the model function in local,not use release.In this case ,should i get the license key?
thank you .

 

A development license key will allow you to deploy the Model Target feature for testing, Would you be able to share your Model Target dataset that is encountering this issue? This will allow me to better investigate the issue. You can share it with me privately if preferred.

 

I had the same problem
Model Target Generator 7.2.24
Unity 2017.3.0
Upload sample
Verification please