# Error when DW modelling

**URL:** <https://discourse.slicer.org/t/error-when-dw-modelling/29445>\
**Category:** Support\
**Created:** [May 13, 2023, 4:27pm UTC](https://discourse.slicer.org/t/error-when-dw-modelling/29445 "2023-05-13T16:27:43Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ATAKAN\_Isik](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/atakan_isik/32/65977_2.png) [@ATAKAN\_Isik](https://discourse.slicer.org/u/ATAKAN_Isik)\
**Post date:** [May 13, 2023, 4:27pm UTC](https://discourse.slicer.org/t/error-when-dw-modelling/29445/1 "2023-05-13T16:27:44Z")

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Operating system:win10  
Slicer version:5.2.2  
Expected behavior:Volume İmaging  
Actual behavior:Vtk Error  
I am trying to use DWmodelling section in SlicerProstate extensions But when i load MRML images and start monoexponential analysis iam getting errors like:  
Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC207C0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC1E4B0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC207C0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC207C0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC1E4B0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC207C0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC29730) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC2B2D0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC29730) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC29730) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC2B2D0) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC29730) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC1E290) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC20380) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC1E290) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC1E290) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageThreshold(000002277EC20380) has 0 connections but is not optional.

[VTK] Input port 0 of algorithm vtkImageMapToWindowLevelColors(000002277EC1E290) has 0 connections but is not optional.

i was not getting these error at my other computer  
What did i do wrong?  
Thanks for help.

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<div class="post-metadata">

**Author:** ![ATAKAN\_Isik](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/atakan_isik/32/65977_2.png) [@ATAKAN\_Isik](https://discourse.slicer.org/u/ATAKAN_Isik)\
**Post date:** [May 16, 2023, 2:11pm UTC](https://discourse.slicer.org/t/error-when-dw-modelling/29445/2 "2023-05-16T14:11:04Z")

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Well looks like nobody cares

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<div class="post-metadata">

**Author:** ![ATAKAN\_Isik](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/atakan_isik/32/65977_2.png) [@ATAKAN\_Isik](https://discourse.slicer.org/u/ATAKAN_Isik)\
**Post date:** [May 29, 2023, 4:45pm UTC](https://discourse.slicer.org/t/error-when-dw-modelling/29445/3 "2023-05-29T16:45:56Z")

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Ok i found the problem closing the anit-virus program solves the problem