# Negative levels

**URL:** <https://forum.dynamobim.com/t/negative-levels/92761>\
**Category:** Uncategorized\
**Tags:** revit, dynamo\
**Created:** [August 10, 2023, 6:01am UTC](https://forum.dynamobim.com/t/negative-levels/92761 "2023-08-10T06:01:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Cris0016](https://avatars.discourse-cdn.com/v4/letter/c/898d66/32.png) [@Cris0016](https://forum.dynamobim.com/u/Cris0016)\
**Post date:** [August 10, 2023, 6:01am UTC](https://forum.dynamobim.com/t/negative-levels/92761/1 "2023-08-10T06:01:52Z")

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hi,  
I wanted to see how I can fix this level issue with negative in Dynamo. as I am working with a big range project of tunnel with negative value for the elevation level.

 ![negative level](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/4/14a14e23cca0f9a54eed75e53d07775c84780290.png)

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<div class="post-metadata">

**Author:** ![Boldrup](https://avatars.discourse-cdn.com/v4/letter/b/f05b48/32.png) [@Boldrup](https://forum.dynamobim.com/u/Boldrup)\
**Post date:** [August 10, 2023, 6:17am UTC](https://forum.dynamobim.com/t/negative-levels/92761/2 "2023-08-10T06:17:56Z")

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Hi,  
It looks like the problem is nested lists. The List.GetItemAtIndex is not happy about the index you are feeding it. My guess is that you should start from index 0 until 2 because the list you are feeding it contains 3 lists.

Hopefully that helps.