[Gmsh] something wrong in edge loop after extrude a line or a surface

[Paulo@gmx]

Hello at all,

I started to model a volume by starting defining points, lines and 
surfaces. Now I want to create my volume by extruding surfaces or lines. 
If I do this by clicking the commands in the gmsh dialog it works 
perfect. But if I choice geometry reload or reopening the geo file I got 
all times the error message that there is "something wrong in edge loop"!

The geometry crashes if the command:

Extrude {0, 0, 10e-3} {
  Line{2};
}

will be stay in the geo file. The line 2 will be extruded but I miss 
other lines, which were created before the extruded lines?!? So my 
question is, what I'm doing wrong?

Thanks in advance and best regards
pajofego