Unable to paint under rhe segmentation module

Hello guys, 'im trying to paint the area on the ROI I determined but, it wont segment the area. it “erase” itself whenever I stop holding and dragging the mouse. I cant draw anything too. I could segment without problems before.

Can someone guide me so i can start my segmentation?
Thanks in advance.

Please read these two threads:

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Thank you!
The second post was the solution to my problem :slight_smile:

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