# Avoiding setSingleStep warning when changing spacing of projection volume node

**URL:** <https://discourse.slicer.org/t/avoiding-setsinglestep-warning-when-changing-spacing-of-projection-volume-node/5391>\
**Category:** Development\
**Created:** [January 16, 2019, 6:09pm UTC](https://discourse.slicer.org/t/avoiding-setsinglestep-warning-when-changing-spacing-of-projection-volume-node/5391 "2019-01-16T18:09:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [January 16, 2019, 6:09pm UTC](https://discourse.slicer.org/t/avoiding-setsinglestep-warning-when-changing-spacing-of-projection-volume-node/5391/1 "2019-01-16T18:09:31Z")

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When I’m changing the spacing of a volume dimension that is only 1 voxel, such as an intensity projection volume, I keep getting warnings like below whenever the spacing is increased. Is there something I can call prior to increasing spacing so that I can avoid this issue?

`ctkSliderWidget::setSingleStep() 5.43941 is out of bounds. 18.2257 21.704 19.9649` originates from [here](https://github.com/commontk/CTK/blob/cccef11c938cc946789ddb25ccc613287a33c56e/Libs/Widgets/ctkSliderWidget.cpp#L414-L415).  
 ![image-projection-spacing](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/c/d/cd5e3544ab234ced7a62a97ce8bdd98b081ef6bd.png)