I've been using this nice feature for ages, but some time ago I observed that error messages didn't appear as before.

When I found the errors I remarked that they were the same type as others giving me error message some months ago.

One example this night. I had exceeded the maximum number of models, and I didn't get any error message.

I've written again the command, but it was not the solution.

Any idea why this is happening and how to solve?