@unknownuser said:

Well, they do not have to but (especially with for less experienced users), these are good suggestions.

I certainly agree that it is a good general suggestion. I really just wanted to point out it isn't absolutely necessary to follow it & mention a few of the reasons why someone might want to do something else.

My SolidSolver now resolves many errors - but nothing is infallible, if you want to contrive a form that has enough convolution in the errors nothing can fix it but some hard work !