# An error occurred while adding nii format data

**URL:** <https://discourse.slicer.org/t/an-error-occurred-while-adding-nii-format-data/31083>\
**Category:** Support\
**Tags:** python\
**Created:** [August 10, 2023, 8:42am UTC](https://discourse.slicer.org/t/an-error-occurred-while-adding-nii-format-data/31083 "2023-08-10T08:42:12Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ThreeStones1029](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/threestones1029/32/67127_2.png) [@ThreeStones1029](https://discourse.slicer.org/u/ThreeStones1029)\
**Post date:** [August 10, 2023, 8:42am UTC](https://discourse.slicer.org/t/an-error-occurred-while-adding-nii-format-data/31083/1 "2023-08-10T08:42:13Z")

</div>

Problem report for Slicer 5.2.2 linux-amd64: [please describe expected and actual behavior]  
Hello:

I met a problem, the thing is like this, I did not close the software after adding two nii.gz data, and later I wanted to add another nii.gz file, but when I clicked add data in File, the pop-up window was black (the pop-up window is as follows), so I immediately checked the log file. The uploaded attachment is the bug log. I checked the log and guessed it was a QT problem, but I didn’t know how to fix it.

I’ve tried turning it back on, but it only seems to last a while, and the problem keeps recurring.  
If anyone has encountered the same problem, can you tell me how to solve it? Thank you very much.

 ![图片](https://us1.discourse-cdn.com/flex002/uploads/slicer/original/3X/e/4/e427fadd38b034b8497c817e6e0b3b13a4935bc5.png)

> **bug log:**
>
> ```txt
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Session start time .......: 2023-08-10 08:47:18
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Slicer version ...........: 5.2.2 (revision 31382 / fb46bd1) linux-amd64 - installed release
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Operating system .........: Linux / 5.15.0-78-generic / #85~20.04.1-Ubuntu SMP Mon Jul 17 09:42:39 UTC 2023 / UTF-8 - 64-bit
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Memory ...................: 32011 MB physical, 31249 MB virtual
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - CPU ......................: GenuineIntel Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz, 10 cores, 20 logical processors
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - VTK configuration ........: OpenGL2 rendering, Sequential threading
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Qt configuration .........: version 5.15.2, with SSL, requested OpenGL 3.2 (core profile)
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Internationalization .....: disabled, language=
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Developer mode ...........: disabled
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Application path .........: /home/***/Slicer-5.2.2-linux-amd64/bin
> [DEBUG][Qt] 10.08.2023 08:47:18 [] (unknown:0) - Additional module paths ..: (none)
> [DEBUG][Python] 10.08.2023 08:47:24 [Python] (/home/***/Slicer-5.2.2-linux-amd64/lib/Slicer-5.2/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:38) - Scripted subject hierarchy plugin registered: Annotations
> [DEBUG][Python] 10.08.2023 08:47:25 [Python] (/home/***/Slicer-5.2.2-linux-amd64/lib/Slicer-5.2/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:38) - Scripted subject hierarchy plugin registered: SegmentEditor
> [DEBUG][Python] 10.08.2023 08:47:25 [Python] (/home/***/Slicer-5.2.2-linux-amd64/lib/Slicer-5.2/qt-scripted-modules/SubjectHierarchyPlugins/AbstractScriptedSubjectHierarchyPlugin.py:38) - Scripted subject hierarchy plugin registered: SegmentStatistics
> [DEBUG][Qt] 10.08.2023 08:47:25 [] (unknown:0) - Switch to module: "Welcome"
> [INFO][VTK] 10.08.2023 08:47:49 [vtkMRMLVolumeArchetypeStorageNode (0x8045660)] (/work/Stable/Slicer-0/Libs/MRML/Core/vtkMRMLVolumeArchetypeStorageNode.cxx:513) - Loaded volume from file: /home/ ***/Desktop/ITK_3D/data/***.nii.gz. Dimensions: 512x512x464. Number of components: 1. Pixel type: int.
> [DEBUG][Qt] 10.08.2023 08:47:49 [] (unknown:0) - "Volume" Reader has successfully read the file "/home/jjf/Desktop/ITK_3D/data/***.nii.gz" "[3.52s]"
> [INFO][VTK] 10.08.2023 08:51:33 [vtkMRMLVolumeArchetypeStorageNode (0xc44c980)] (/work/Stable/Slicer-0/Libs/MRML/Core/vtkMRMLVolumeArchetypeStorageNode.cxx:513) - Loaded volume from file: /home/ ***/Desktop/ITK_3D/data/***.nii.gz. Dimensions: 512x512x420. Number of components: 1. Pixel type: int.
> [DEBUG][Qt] 10.08.2023 08:51:33 [] (unknown:0) - "Volume" Reader has successfully read the file "/home/jjf/Desktop/ITK_3D/data/***.nii.gz" "[3.13s]"
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9348, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9351, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9367, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9368, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9380, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9384, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9385, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:03 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9389, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:04 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9392, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:04 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9396, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:04 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 9400, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [DEBUG][Qt] 10.08.2023 09:02:14 [] (unknown:0) - Switch to module: "DICOM"
> [CRITICAL][Stream] 10.08.2023 09:02:14 [] (unknown:0) - Database folder does not contain ctkDICOM.sql file: /home/***/Documents/SlicerDICOMDatabase
> [WARNING][Qt] 10.08.2023 09:02:18 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10053, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:18 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10056, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:18 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10060, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:18 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10061, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:22 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10094, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:22 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10095, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:24 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10106, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:24 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10107, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:25 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10125, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:25 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10136, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:25 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10137, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:25 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10148, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:30 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10296, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:30 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10299, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:30 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10303, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:30 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10304, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [DEBUG][Qt] 10.08.2023 09:02:36 [] (unknown:0) - Switch to module: "Data"
> [WARNING][Qt] 10.08.2023 09:02:39 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10689, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:39 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10692, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:39 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10708, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:39 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10709, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:41 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10724, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:41 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10725, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:41 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10726, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:41 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10727, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:41 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10728, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:02:43 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10737, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:38 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10757, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10774, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10778, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10782, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10786, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:43 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10978, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:43 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10981, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:43 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10997, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:43 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 10998, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11011, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11015, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11019, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11020, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11021, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11022, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:44 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11023, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:49 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11045, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:06:49 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11049, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [DEBUG][Qt] 10.08.2023 09:07:31 [] (unknown:0) - Switch to module: "Welcome"
> [WARNING][Qt] 10.08.2023 09:07:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11988, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:07:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 11991, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:07:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 12007, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> [WARNING][Qt] 10.08.2023 09:07:40 [] (unknown:0) - QXcbConnection: XCB error: 8 (BadMatch), sequence: 12008, resource id: 121634877, major code: 130 (Unknown), minor code: 3
> 
> ```

---

<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:** [August 10, 2023, 8:59am UTC](https://discourse.slicer.org/t/an-error-occurred-while-adding-nii-format-data/31083/2 "2023-08-10T08:59:59Z")

</div>

Thanks for reporting, it seems like the same or very similar issue as this one:

> <https://github.com/Slicer/Slicer/issues/7153>
>
> \## Summary
> Switching workspaces in Ubuntu can be done with the \`ctrl\` + \`alt\` +… \`down\` / \`up\` arrow keys. If a user opens slicer, loads two volumes into the foreground / background, switches workspaces, then returns to the workspace with slicer open, two UI failures happen:
> 
> 1. Clicking the "add data" button opens a completely black menu box
> 2. The foreground / background volumes can no longer be changed (the dropdown menu doesn't appear)
> 
> See the attached video for an example of both of these errors.
> 
> \## Steps to reproduce
> 1. Load a volume into the background and foreground for a given slice view
> 2. Change to a different workspace (\`ctrl\` + \`alt\` + \`down\` / \`up\`)
> 3. Change back to the original workspace with slicer open
> 4. Try clicking the "add data" button and observe that the menu is completely black
> 5. Try changing the foreground / background volumes and observe that the drop down menu doesn't appear
> 
> \## Environment
> \- Slicer version: Slicer-5.3.0-2023-08-03
> \- Operating system: Ubuntu 20.04
> 
> The following debug output from the error log might be helpful:
> 
> \`\`\`
> QXcbConnection: XC
> 
> https://github.com/Slicer/Slicer/assets/26352734/7fc4027d-c515-4c30-aa5a-14adc4571b63
> 
> B error: 8 (BadMatch), sequence: 3577, resource id: 41943173, major code: 130 (Unknown), minor code: 3
> QXcbConnection: XCB error: 8 (BadMatch), sequence: 3580, resource id: 41943173, major code: 130 (Unknown), minor code: 3
> QXcbConnection: XCB error: 8 (BadMatch), sequence: 3593, resource id: 41943173, major code: 130 (Unknown), minor code: 3
> QXcbConnection: XCB error: 8 (BadMatch), sequence: 3594, resource id: 41943173, major code: 130 (Unknown), minor code: 3
> \`\`\`
> 
> https://github.com/Slicer/Slicer/assets/26352734/c8829dd9-b543-4697-bb2e-4f8e1d63e02f