Disable 'add measurement' in multiple limit test

Hello,

My goal is to make a step type which executes a specific code which returns 3 measurements. The user who uses the step of that type must be able to apply limits on these measurements but not change the number of measurements.

So I use a Multiple Numeric Limit test, but I don't succeed in fixing the number of numeric limit test

On way could be to disable add/remove measurement from the limit tab, but I didn't found the way to do that

I tried to make Step.ExpectedNumMeas not editable, but that doesn't work

Does anybody have an idea ?

Thanks

Laurent