Zero-thickness problem when trying to combine weldments frame

[Bjarne Vh]

Hi,

I'm trying to combine a frame which is made with the weldment module. For the drawing this needs to become 1 part so I tried to combine the different profiles using the combine feature but I get a zero-thickness error and I have no idea how to fix it. I've tried some different sizes of profiles in some spots but even then I still get the error. I hope someone can help me out. Please contact me so I can maybe e-mail you the frame I'm talking about.

Thanks in advance,
Bjarne