Kernel error on visualization

Hello, this is Xavier from Spain.

For many days I am fighting with an error that is happening on my visualizations. It seems everything it is going ok, and for no reason, in the next design procesing I have the same error and can not contnue procesisng… If I start a new project, and importing datasmith again, it works again. But I have the scene complete, I do not wanting to do everything again…Anybody knows WHY this error happening??

Thanks a lot team!!