graspit GUI goes wrong occasionally

Hello, I had installed the graspit-ros package and run the graspit-simulator successfully, like this:

But sometimes the GUI couldn't display correctly, like this

And it could not also load the world file after I click Menu->open. The window showed noting.

Then I closed the graspit-simulator and opened again. If luckily, after I repeated many times, the GUI will display correctly. Is there anyone who has encountered the same problem. How can I resolve it? (I run the simulator in Ubuntu18.04)

Dec 02 '19 03:12 zhangcogito

@zhangcogito Do you get an error on the terminal? What is printed out on the terminal where you run graspit_simulator?

Dec 02 '19 06:12 iretiayo

@zhangcogito Do you get an error on the terminal? What is printed out on the terminal where you run graspit_simulator?

Thanks for your reply! There is no output in the terminal.

But now, it gets better. If I wait for several minutes and then run the graspit-simulator, the GUI will display correctly.

Dec 02 '19 13:12 zhangcogito