# Set type parameter - doesn't work **URL:** \ **Category:** Packages\ **Created:** [January 7, 2016, 6:24am UTC](https://forum.dynamobim.com/t/set-type-parameter-doesnt-work/2863 "2016-01-07T06:24:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Thorsten\_Strathaus1](https://avatars.discourse-cdn.com/v4/letter/t/ea666f/32.png) [@Thorsten\_Strathaus1](https://forum.dynamobim.com/u/Thorsten_Strathaus1)\ **Post date:** [January 7, 2016, 6:24am UTC](https://forum.dynamobim.com/t/set-type-parameter-doesnt-work/2863/1 "2016-01-07T06:24:14Z")
Hi, I need to change (delete the values) of lots of type parameter for my doors. That doesn’t work in this way, Dynamo tells me the “Type Mark” parameter doesn’t exist. Any idea how to solve it?   ![Untitled-1](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/1/1ce62f20a2b415347aa4d37ae71505c59f69c5a0.jpg) ---
**Author:** ![Mark\_Thorley1](https://avatars.discourse-cdn.com/v4/letter/m/6f9a4e/32.png) [@Mark\_Thorley1](https://forum.dynamobim.com/u/Mark_Thorley1)\ **Post date:** [January 7, 2016, 6:54am UTC](https://forum.dynamobim.com/t/set-type-parameter-doesnt-work/2863/2 "2016-01-07T06:54:19Z")
Thorsten, you need to convert your door instances to door types and then set the parameter values. You are only accessing instance parameters currently and type mark is a type parameter. ---
**Author:** ![Thorsten\_Strathaus1](https://avatars.discourse-cdn.com/v4/letter/t/ea666f/32.png) [@Thorsten\_Strathaus1](https://forum.dynamobim.com/u/Thorsten_Strathaus1)\ **Post date:** [January 7, 2016, 10:46am UTC](https://forum.dynamobim.com/t/set-type-parameter-doesnt-work/2863/3 "2016-01-07T10:46:18Z")
That worked like a charm, thanks ![Untitled-1](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/2X/f/f04a8018389a4963605b89e3a5ca4cf733907fa3.jpg) I owe you a pint