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Dear all,
I would appereciate some help of you on this:
I am using Comsol 3.5a with RFModule in combination with matlab. In the matlab-script I have a for-loop, in which the geometry stays the same except for one line i draw:

g19=curve3([dx-5e-10,dx+5e-10],[0,0],[dz,dz]);%

its position changes depending on dx,dz.

Now, my problem is: depending on where the line is located, its edge number changes. In the first run it is edge number 17, but in the next run of the for-loop it is not anymore! How can i prevent that or at least get the edge number comsol gives it?
Because
a)
Meshing is then applied to another line, not the one it is intended to:

fem.mesh=meshinit(fem, ...
.....
'edge',[17], ... <-- here
......
'meshstart',fem.mesh);

b) also i give that line a current, but comsol then (after first loop run) gives it to the wrong line:

edg.I0 = {0,1};
edg.type = {'cont','I'};
edg.ind = [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1, ...
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1];

Your help is really appreciated. Thanks in advance!!
Regards,
Alex