"Input pixel repn must be float"

[askieslinger]

Hello,

I have tried using your tool via docker, but am running into problems with vlisa_onesample. I am using a set of contrast maps created in nilearn (nifti1 format). When I try to execute the command

docker run -v C:\...\reports:/data lipsia vlisa_onesample -in /data/sub-SA06_contr-audio.v /data/sub-SA09_contr-audio.v -mask /data/mask.v -out /data/result.v

the error "input pixel repn must be float" results, although I managed to convert the contrast maps from nifti to .v format with vnifti without problems.

I am finding it difficult to interpret this error message. Could you point me in the right direction?
Thanks a lot for your time.