More information, error from tksurfer is as following:

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MRISalloc(16711682, 480): could not allocate vertices
Cannot allocate memory
============

---------- Forwarded message ----------

From: peng <prion.w@gmail.com>
Date: Fri, May 9, 2014 at 1:01 PM
Subject: a question on flat surface
To: "Freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>

Hi Freesurfers,

I have tried to obtain a flat surface as described by the upper part (full cortex) of the following page:

http://freesurfer.net/fswiki/FreeSurferOccipitalFlattenedPatch

However, I failed to load the results in freeview (it took forever), nor can I read in matlab with read_surf. The error in matlab is as following

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Error using reshape

To RESHAPE the number of elements must not change.

Error in read_surf (line 77)

vertex_coords = reshape(vertex_coords, 3, vnum)' ;

======

Thus I suspect in the newly generated surface, the number of vertices in the header does not meet that indicated by the data. I did sth wrong.

Questions:

1 Is this webpage still up-to-date or I shall try something new to flatten the surface?

2 Probably there are "frequently made mistakes" during my manual process, would you please give me a hint? I my case afterwards mris_flatten took 2-3 hours.

btw: the inflated surface is OK either checked by freeview or matlab.

best

Peng