Hello Freesurfer developers,

I am new to Freesurfer and I'm hoping that someone can help me; I'm attempting to get a flattened patch of an entire hemisphere.  Below is a page outlining how to use mris_flatten to achieve this:

I am just trying to achieve this with the tutorial data to start with. 

1. First problem is that when I run the command 'tksurferfv bert lh inflated'; I am getting the error outlined in Image 1.

2.  I realised that I could create a patch using freeview instead of tksurfer.  However I attempted to follow the instructions on the page above to do this and ran into some problems.  Image 2 shows an example of the patch that I created and image 3 shows the error that I get when I attempt to press the Press Fill Uncut Area button  (I tried this many times and got the same result).

3.  However one time I did succeed in making a patch (I don't know what I did differently this time?) - see image 4 attached.  I saved it as lh.full.patch.3d. When I tried to run the command mris_flatten below I got the error outlined in image 5.

mris_flatten -w 10 lh.full.patch.3d lh.full.flat.patch.3d