I just tried to do this myself. MLCad seems to have a problem when you try to insert a mpd into a scene as a part.
Weird errors happen.
So here's an alternative solution:
the mpd file I posted is a multi-file container for 3 files.
I've extracted them from there for you here, just download them separately.
Then do this:
1. put "Technic Baseplate 21 x 30.dat" to your "models" folder.
2. put "side.dat" and "middle.dat" into a folder "s" which you create in "models".
3. start MLCad and choose "File/New". This will give you an empty scene.
4. insert the Technic Baseplate part into that scene by picking it from the part picker tree from "Models"
5. insert other parts at will
6. save the result into a *.ldr file inside the "models" folder
maybe also checkout
http://www.holly-wood.it/mlcad/basic1-en.html
Weird errors happen.
So here's an alternative solution:
the mpd file I posted is a multi-file container for 3 files.
I've extracted them from there for you here, just download them separately.
Then do this:
1. put "Technic Baseplate 21 x 30.dat" to your "models" folder.
2. put "side.dat" and "middle.dat" into a folder "s" which you create in "models".
3. start MLCad and choose "File/New". This will give you an empty scene.
4. insert the Technic Baseplate part into that scene by picking it from the part picker tree from "Models"
5. insert other parts at will
6. save the result into a *.ldr file inside the "models" folder
maybe also checkout
http://www.holly-wood.it/mlcad/basic1-en.html