Constraints are not satisfied

[captjim]

OK, make a new family based on the Generic Model.rft template.
Make sure the Center (Left/Right) reference plane is pinned and it Defines Origin.
Add 2 reference planes, one to the left and one to the right of the Center (Left/Right) reference plane.
Dimension each of these new reference planes to the Center (Left/Right) reference plane and make these dimensions equal.
Add one more dimension between the new reference planes and assign it a new length parameter of Width.
Add 2 more reference planes, one to the left and one to the right outside the prevously added reference planes.
Dimension each of these reference planes to its adjacent reference plane and assign these dimensions a new length parameter of Overhang.

The "Constraints are not satisfied".

Why?

Why do these last reference planes not just move away from the previously pinned and constrained stuff like they logically should?

[Dimitri Harvalias]

Dimension each of these new reference planes to the Center (Left/Right) reference plane and make these dimensions equal.

Be sure you place this as one dimension string with three clicks rather than two separate dimensions.
Generally you get more predictable results when ref planes that will be controlled by an equality constraint are initially set out at equal distances prior to assigning equality constraints. Then you can work your way from the inside out with your other parameters adn dimensions.

[captjim]

Generally you get more predictable results when ref planes that will be controlled by an equality constraint are initially set out at equal distances prior to assigning equality constraints. Then you can work your way from the inside out with your other parameters and dimensions.

Thanks for the tip Dimitri, but that didn't seem to be it in this case.

Here I've found that it was necessary to set the value of the dimension the same as the value of the "Overhang" parameter before assigning the "Overhang" parameter to the dimension.

Any additional insight on this would be welcomed.

[Dimitri Harvalias]

So are you still having the problem? I followed the steps you outlined and applied dims and parameters as I normally would and had no problems.
Can you post the family?

[captjim]

So are you still having the problem? I followed the steps you outlined and applied dims and parameters as I normally would and had no problems.
Can you post the family?

No Dimitri, I've gotten it to work. In my last post I was just sharing specifically what made it work. If you have constrained geometry and add an additional length parameter to new geometry, it is when the position of the new geometry does not match the value of your parameter while you assign it that can generate the problem. Fix is to make the value of the dimension match the value of the parameter before you apply it and then it will follow the value of the length parameter like a puppy on a leash. Thanks for your help