Creating surface for retopo using grease pencil and Bsurface

more than a year I have not done retopo on a model
I use Blender 2.74.2 on an ubuntu machine
Now I did a screenshot of the problem I face
On a model on which I have done some dynotopo, I want to creat faces using Bsurface and GP
As you can see I have the strokes in place, but when I want to create the surfaces avec Bsurface the system tells me that there are no strokes?
I went back to video on that subject but I feel confused as I did not see what I did wrong?
Can somebody point to me where I missed the point?
Thanks in advance

Attachments


Grease pencil strokes are bound to scene by default. Switch to object and after switching, select the datablock from the list if you want existing strokes back.

nope… I did delete the data block then did restart creating stroked on the scene instead of the object but still tells me no strokes… I know I have done that years ago …

It didn’t have that option years ago, just months ago


He means he was able to use this functionality before, not about the new grease pencil state.

The changing to Object in both places works for me here on Linux Mint.