We are doing some cortical flat mapping in FreeSurfer.  We are following these instructions: http://openwetware.org/wiki/Beauchamp:FreeSurfer#Creating_Flat_Maps.  We are able to create the flat map without a problem.  However, just before we are able to do the last step "Save the patch by clicking File->Patch->Save Patch As" the process crashes and the flat map is lost. 

In the terminal, we see this error: 

surfer: filling (ctrl-c to cancel)...... done, 154370 vertices filled      #Filling the uncut area was successful. 

surfer: ripped 12057 vertices

tksurfer.bin: tnl/t_vertex.c:407: update_input_ptrs: Assertion `a[j].inputstride == vptr->stride' failed.

Abort (core dumped)

So, the uncut area is filled and before we have time to click File, Save As, etc. . . the process crashes and we have to start the process over again. 

Any suggestions? Thanks for your time. 

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