Just downloaded the simulator to my linux machine.

Just downloaded the simulator to my linux machine. Programt starts up, runs the demo (immediatly, without any keystrokes). When I try to load any gcode file it reports “Failed to load model. Is this a valid Gcode file? No valid Gcode line found” . Any suggestions?
Here’s an example file content (hand entered in text editor-not word processor:
G01 X1.0 Y1.0 Z-.5
G01 X2.0 Y2.0
M30
%

java -showversion
java version “1.7.0_75”
OpenJDK Runtime Environment (IcedTea 2.5.4) (7u75-2.5.4-1~utopic1)
OpenJDK 64-Bit Server VM (build 24.75-b04, mixed mode)

hm, the gode example looks ok. Which version of GCodeSimulator do you have ? Can you send me the gcode file so that I can recreate the problem (gcode@dietzm.de)?

New version of GcodeSimulator V1.30 available which fixes the problem.
http://www.dietzm.de/gcodesim/#Download