# Weird Error but everything looks okay

**URL:** <https://discourse.slicer.org/t/weird-error-but-everything-looks-okay/21939>\
**Category:** Support\
**Created:** [February 12, 2022, 5:41pm UTC](https://discourse.slicer.org/t/weird-error-but-everything-looks-okay/21939 "2022-02-12T17:41:16Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![NoobForSlicer](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/noobforslicer/32/10900_2.png) [@NoobForSlicer](https://discourse.slicer.org/u/NoobForSlicer)\
**Post date:** [February 12, 2022, 5:41pm UTC](https://discourse.slicer.org/t/weird-error-but-everything-looks-okay/21939/1 "2022-02-12T17:41:16Z")

</div>

I get this error but the models and segmentations I imported look really good… Is there something wrong?

SetConversionParameter: Conversion parameter ‘Default slice thickness’ not found in converter rules!

---

<div class="post-metadata">

**Author:** ![NoobForSlicer](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/noobforslicer/32/10900_2.png) [@NoobForSlicer](https://discourse.slicer.org/u/NoobForSlicer)\
**Post date:** [February 13, 2022, 10:48am UTC](https://discourse.slicer.org/t/weird-error-but-everything-looks-okay/21939/2 "2022-02-13T10:48:17Z")

</div>

anyone? Please help?

What does this error even mean

---

<div class="post-metadata">

**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [February 13, 2022, 1:47pm UTC](https://discourse.slicer.org/t/weird-error-but-everything-looks-okay/21939/3 "2022-02-13T13:47:53Z")

</div>

This just means that the segmentation was created with an earlier Slicer version or the `Default slice thickness` parameter is missing for some other reason.

The parameter may be needed for planar contour to closed surface conversion if contours are not defined for every slice.

Most likely you can ignore this warning.