Tk_Init error: Can't find a usable tk.tcl in the following directories

CST

5/20/23, 4:54 PM

On my Ubuntu 20.04 I try to open "qdec" of "freesurfer" and get the following error:

Tk_Init error: Can't find a usable tk.tcl in the following directories: 
    /home/username/tcl8.4.6/tk8.4 /home/username/freesurfer/freesurfer/lib/tk8.4 /home/username/freesurfer/lib/tk8.4 /home/username/freesurfer/freesurfer/library /home/username/freesurfer/library /home/username/freesurfer/tk8.4.6/library /home/username/tk8.4.6/library

This probably means that tk wasn't installed properly.

the rest of freesurfer works (e.g. "freeview") and I am not able to find out how to fix this problem. I think I should somehow install tk8.4.6 in one of the directories it is searching for it or link the directory to an installed version, but I am not sure how to do it. Could someone help me?

edit: freesurfer is a neuroimaging toolbox and qdec is a specific programme of this toolbox. I attached the wiki of the toolbox and the page where I found out about the qdec gui.

freesurfer wiki: https://surfer.nmr.mgh.harvard.edu/fswiki

qdec introduction: https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/QdecGroupAnalysis_freeview

I installed freesurfer version freesurfer-linux-centos6_x86_64-7.2.0-20210720-aa8f76b

0 + 0

xubuntu

tcl

20.04

N0rbert

5/20/23, 5:11 PM

What are qdec and freesurfer? What was wrong with `tk` and `tcl` packages from official repository? Please make your question more reproducible.

steeldriver

5/20/23, 5:37 PM

According to this [FreeSurfer Setup and Configuration](https://surfer.nmr.mgh.harvard.edu/fswiki/SetupConfiguration_Linux) the installation should have come with its own tcl/tk distributions, located in `$FREESURFER_HOME/lib/tcltktixblt`. Do you see anything there?

CST

5/24/23, 9:21 AM

@steeldriver: After installing freesurfer, I have several folders in the lib, but no tcltktixblt.. I found: $FREESURFER_HOME/lib/{ tcl, tktools, bem, images, qt, resource, vtk}

Score:0

Ubuntu

CST

5/26/23, 9:32 AM

After inspecting my folders I realized, that freesurfer was looking in the lib path but not in lib/tktools so I copied everything from the lib/tktools folder into the lib folder, as I did not know how to change the folders it was searching. Now I can run the qdec gui.

0 + 0

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Tk_Init error: Can't find a usable tk.tcl in the following directories

TH: ข้อผิดพลาด Tk_Init: ไม่พบ tk.tcl ที่ใช้งานได้ในไดเร็กทอรีต่อไปนี้

RO: Eroare Tk_Init: Nu se poate găsi un tk.tcl utilizabil în următoarele directoare

RU: Ошибка Tk_Init: не удается найти пригодный для использования tk.tcl в следующих каталогах

VI: Lỗi Tk_Init: Không thể tìm thấy tk.tcl có thể sử dụng được trong các thư mục sau

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