rotating machine examples, Ubuntu 14.10
 

New to Gmsh. Have tried above examples at http://onelab.info/wiki/Electric_Machines , but only get geometry/mesh display; no magnetic analysis so I can't duplicate example displays. Generally, I get various file errors when attempting to read the models. "Guessing" my way through the GUI.
Is there a "how-to" anywhere that outlines the GUI and the various menus? Haven't found one so far.
Would appreciate any suggestions.