itk::ERROR Image(0x55f0ab8f5690): A spacing of 0 is not allowed: Spacing is [0, 0, 0]

Algorithms
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1

Hello, everyone!
I am struggling with that error:
itk::ERROR Image(0x55f0ab8f5690): A spacing of 0 is not allowed: Spacing is [0, 0, 0]

The situation is the following:
I am performing a multistage image registration.
First stage is a rigid transform (3DVersorRigidTransform) using the regularStepGradientDiscentOptimizer;

After that I resample the moving image to obtained a rigidly registered image.

That image is used as the input for the deformable stage.
This stage starts ok, but crashes right away with that error message.

I already tested the process with two different optimizers for the deformable stage: LBFGSBOptimizer and LBFGSOptimizer . No success though.

Any clues are welcome.
Thanks,

Leo.

2

Sounds like you have a bug in your code. Trying to create a MWE might reveal it.

3

I’m not aware of how to create and handle a MWE.
Could you go into the specifics of that?

I also tried to debug with Qt Creator, but no success.

My pipeline is based on DeformableRegistration8.cxx.
I even tried to run the example alone, but it is running tooo slow, and the optimizer output do not sound reasonable.

Thanks.

4

Here are some instructions on how to create minimum working example (MWE).