Thank you very much for your response,
I tried your ways but still find the error.
kindly look in to the attached file and suggest some points to resolve it.

Thanks in anticipation.

Hello Maher,
Thanks a lot for your valuable suggestions and for showing interest to resolve my problem.
I am using a DICOM image. and for loading image into sim vascular first, I create a project and then through open file import image.

Hello,
I am using Open source software sim vascular 2020.04.06,
when i am try to do segmentation for multi vessel using Machine it's continuously showing error and after some time it closes the the software automatically.
i request to someone kindly suggest me how to resolve mentioned problem.