At execproc runtime call when this option is checked and the value of the parameter is null display a warning message.

When "mandatory" is not checked nothing is done and the component workd like before.

The principe is a bit like "assertions" in code ... we want to make sure that parameters required by procedures are filled by programmers and not forgotten.

Thanks
Those who don't want the feature can just ignore it.

The concept could be extended to an assertion formula, but for us a checkbox is enought