# Internal error, please report: Dereferencing a non-pointer **URL:** \ **Category:** Lists-Logic\ **Tags:** revit, dynamo\ **Created:** [February 11, 2018, 2:11pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974 "2018-02-11T14:11:51Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mojtaba31114](https://avatars.discourse-cdn.com/v4/letter/m/9fc29f/32.png) [@mojtaba31114](https://forum.dynamobim.com/u/mojtaba31114)\ **Post date:** [February 11, 2018, 2:11pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/1 "2018-02-11T14:11:51Z")
How could I fix this problem? ![Screenshot%20(200)](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/2/2/22b1a543237c1694ebdff3f246ffbc392b3b2937.png) ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [February 11, 2018, 2:24pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/2 "2018-02-11T14:24:02Z")
try feeding in a coordinate system at the cs input ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/d/2/d21cca2d43f0f91e71514e110042d75244caea95.png) ---
**Author:** ![mojtaba31114](https://avatars.discourse-cdn.com/v4/letter/m/9fc29f/32.png) [@mojtaba31114](https://forum.dynamobim.com/u/mojtaba31114)\ **Post date:** [February 11, 2018, 4:01pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/3 "2018-02-11T16:01:55Z")
Thanks, previous problem was solved but I got a new problem. How could I fix it? ![Screenshot%20(201)](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/7/4/744235c2c95ed98cd363c93319ff221fc37adede.png) ---
**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\ **Post date:** [February 11, 2018, 4:22pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/4 "2018-02-11T16:22:35Z")
Post your entire graph via the camera export in the top right, your dyn file, and an rvt file that we can use it on. That error means you are feeding the wrong type of data into the node. In this case it’s asking for a polycurve. You’re likely feeding it a curve or a null or other bad data somewhere along the line. Since you only gave us the one sample of the graph we can’t solve it as we can’t see why it’s failing. It would be like asking a doctor to fix your headache by sending them a picture of your foot. ---
**Author:** ![Kulkul](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/kulkul/32/49801_2.png) [@Kulkul](https://forum.dynamobim.com/u/Kulkul)\ **Post date:** [February 11, 2018, 4:27pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/5 "2018-02-11T16:27:33Z")
And also show preview of each node. ---
**Author:** ![mojtaba31114](https://avatars.discourse-cdn.com/v4/letter/m/9fc29f/32.png) [@mojtaba31114](https://forum.dynamobim.com/u/mojtaba31114)\ **Post date:** [February 11, 2018, 4:33pm UTC](https://forum.dynamobim.com/t/internal-error-please-report-dereferencing-a-non-pointer/18974/6 "2018-02-11T16:33:41Z")
Thanks Jacob, this is dyn file and camera export … [Kronz\_RationalDiamondBall.dyn](https://forum.dynamobim.com/uploads/short-url/fi0Y7ivpPtlO4mjgNslH3xFQk8P.dyn) (44.8 KB) ![Capture](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/0/10a0da01bcafc9c60c663f7b5cb0afc74a5010a9.png)