# Problem when adding second mrb file to scene

**URL:** <https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409>\
**Category:** Support\
**Created:** [November 3, 2020, 5:43pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409 "2020-11-03T17:43:18Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![alexjamesmajor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alexjamesmajor/32/8627_2.png) [@alexjamesmajor](https://discourse.slicer.org/u/alexjamesmajor)\
**Post date:** [November 3, 2020, 5:43pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/1 "2020-11-03T17:43:18Z")

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Running on Windows 10 and a recent version of Slicer (shown in picture)

When I add a second .mrb file (I’m aiming to compare two different scans) with File → Add Data, the scene goes blank. This doesn’t appear to be a RAM issue.

Any advice would be greatly appreciated!

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/5/0/50f4f4a3e089eb2ed9e13b9c449a02ce497fc9f3.jpeg)  
 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/d/fd87e20ba131bf80a2bf783251982cdf21c21566.png)

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**Author:** ![alexjamesmajor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alexjamesmajor/32/8627_2.png) [@alexjamesmajor](https://discourse.slicer.org/u/alexjamesmajor)\
**Post date:** [November 3, 2020, 5:43pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/2 "2020-11-03T17:43:46Z")

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First image is the first mrb file, second image is after adding the second mrb file.

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**Author:** ![alexjamesmajor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alexjamesmajor/32/8627_2.png) [@alexjamesmajor](https://discourse.slicer.org/u/alexjamesmajor)\
**Post date:** [November 3, 2020, 5:45pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/3 "2020-11-03T17:45:35Z")

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Slicer version Slicer 4.11.20200930

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [November 3, 2020, 6:46pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/4 "2020-11-03T18:46:29Z")

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A .mrb file has an entire scene inside, so perhaps loading one on top of another could lead to some inconsistency. If you save the data in non-mrb form you should be able to load both volumes into a new scene.

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**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:** [November 3, 2020, 8:05pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/5 "2020-11-03T20:05:01Z")

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Probably you need to select what you want to show in slice viewers (due to [this](https://github.com/Slicer/Slicer/issues/4570) issue). For example, you can go to Data module and show the two volume overlaid on top of each other using the visibility column:

 ![image](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/f/4/f43bbeb01a4a23cef2e93ecc24432ab7d94bcd1c.png)

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<div class="post-metadata">

**Author:** ![alexjamesmajor](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/alexjamesmajor/32/8627_2.png) [@alexjamesmajor](https://discourse.slicer.org/u/alexjamesmajor)\
**Post date:** [November 3, 2020, 11:15pm UTC](https://discourse.slicer.org/t/problem-when-adding-second-mrb-file-to-scene/14409/6 "2020-11-03T23:15:41Z")

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Andras, this solved my issue. Thanks again! I appreciate the help.

Alex