Do you know what you did to change the data between when you ran the first model and when you tried to run it again?
If I run a neural net model, then hide and exclude some rows, then open the model launch and re-run the model, I get the same prompt that you are seeing. From the red triangle menu at the very top outline bar, there is an option to sync the data.
After I click the sync option then I can run other models.
JMP Systems Engineer, Health and Life Sciences (Pharma)