Hi Noam,
Do the volumes look okay? I’m seeing a lot of ‘non-orthogonal axes’ warnings in the log. If that’s not the issue, this could be a bug that’s randomly occurring with parallel recons in v7. Although, I’ve never seen it fail during mri_convert. Can you try to rerun? It might succeed the second time. If not, can you send us the input scan and try again without the -parallel flag.
best Andrew
From: freesurfer-bounces@nmr.mgh.harvard.edu on behalf of "Peled, Noam" NPELED@mgh.harvard.edu Reply-To: FS Help freesurfer@nmr.mgh.harvard.edu Date: Tuesday, November 24, 2020 at 10:10 PM To: FS Help freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] error: MatrixMultiply: m1 is null
Dear FreeSurfer community, I encountered a recon-all error where I couldn’t find on the web. The error message is: “error: MatrixMultiply: m1 is null!”. You can find the complete log attached. I used the stable7.1.1 version.
Thanks, Noam