PCA creation error in Population analysis module

[shoaib-mra]

Dear SVA Team,

My name is Shoaib Attar and I am a new user of the software SlicerSALT (4.0.1). I have been trying to input a set of groomed femurs (n=4) to create a PCA chart. But I keep getting an error. I am attaching a screenshot of the error. I am confused about what could be the mistake in this case. Can you please help me solve this problem?

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Please do let me know if I should send you the vtk files of the groomed femurs. I am trying to make a comparison between the PCA results of SlicerSALT and Shapeworks software. This particular dataset did work with shapeworks software but it keeps giving me an error in slicerSALT.

I am looking forward to hearing back from you soon.

with regards,
Shoaib Attar