Programming works only once

Students have built a program that used to work, but now if freezes after the first code. We have linked the brain to VEXOS, updated the firmware, but nothing is working. It only works once the first time is downloaded, but it never works a second time, the always have to build a new program. I’m out of ideas.

@306850 Can you post your code please?

And just to check, you have the latest of VEXOS.

What programming language are you using?