# Bug Input node

**URL:** <https://forum.dynamobim.com/t/bug-input-node/51152>\
**Category:** Civil 3D\
**Created:** [May 28, 2020, 8:47am UTC](https://forum.dynamobim.com/t/bug-input-node/51152 "2020-05-28T08:47:09Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bertrand.savarit](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/bertrand.savarit/32/103266_2.png) [@bertrand.savarit](https://forum.dynamobim.com/u/bertrand.savarit)\
**Post date:** [May 28, 2020, 8:47am UTC](https://forum.dynamobim.com/t/bug-input-node/51152/1 "2020-05-28T08:47:09Z")

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Hello,

Im working on Dynamo for civil and i have an issue with the input node, when i use it in my script the output is “null”, am i missing something?

 ![BUG INPUT](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/a/1a4bd877bb813a2c5b4465b87a3500b003ac7ca5.png)

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**Author:** ![Alban\_de\_Chasteigner](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alban_de_chasteigner/32/39650_2.png) [@Alban\_de\_Chasteigner](https://forum.dynamobim.com/u/Alban_de_Chasteigner)\
**Post date:** [May 28, 2020, 8:54am UTC](https://forum.dynamobim.com/t/bug-input-node/51152/2 "2020-05-28T08:54:26Z")

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Hi @bertrand.savarit,

The custom nodes (.dyf), actually use this syntax `id : type = default` (distance:double=4).  
But in a graph (.dyn), this doesn’t work. Use instead `4;` in a codeblock or `4.0` in a number node.