# Engineer Help me please

**URL:** <https://forum.dynamobim.com/t/engineer-help-me-please/27726>\
**Category:** Revit\
**Tags:** revit, dynamo\
**Created:** [October 27, 2018, 7:55am UTC](https://forum.dynamobim.com/t/engineer-help-me-please/27726 "2018-10-27T07:55:35Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![are\_youhappy](https://avatars.discourse-cdn.com/v4/letter/a/90db22/32.png) [@are\_youhappy](https://forum.dynamobim.com/u/are_youhappy)\
**Post date:** [October 27, 2018, 7:55am UTC](https://forum.dynamobim.com/t/engineer-help-me-please/27726/1 "2018-10-27T07:55:35Z")

</div>

Hi, every engeineer

I hope that anyone some help me, please.

I have some problems…

I use Revit program for structure rebar plan.

So, I want to unlock rebar constraint.

but there are one precondition: Many rebar constraints are unlock whit just one click

If you know some Method(Dynamo or Revit process), Please Help me

---

<div class="post-metadata">

**Author:** ![julian.venczel](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/julian.venczel/32/29998_2.png) [@julian.venczel](https://forum.dynamobim.com/u/julian.venczel)\
**Post date:** [October 29, 2018, 5:16am UTC](https://forum.dynamobim.com/t/engineer-help-me-please/27726/2 "2018-10-29T05:16:13Z")

</div>

I would select all rebar members with select all elements of category: structural rebar then check for a parameter called something like rebar constraint using Element.parameters. Then you’ll want to set it using setparameterValue.by.name if there is such a parameter the unlock value should be 0.