you can ignore the warning as you are working with volumes and not surfaces or ROIs or way points.  The "INFO" is only for informational purposes

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From: miracooloz@gmail.com Sent: Sunday, February 26, 2017 12:28 PM To: Freesurfer support list Subject: PETsurfer mri_coreg problem

Hello Freesurfer, 

While checking the Coregistration step of PETsurfer using tkregisterfv, I encountered an issue (not sure if it was an error). The transform GUI simultaneously opened with freeview and I received this message in the terminal window  ( warning : transformation can only apply to volumes for now. If your data includes ROI/SURFACE/WAY POINTS , please don't use this yet. INFO: LTA input is not RAS to RAS....converting...). What does this mean and how to I convert whatever input to RAS?  mri_coreg finished without error and I want to make sure the pet image was properly  coregistered with the anatomical. Please see the attached screenshot from terminal window.  Thanks.  

Best, 

Paul

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