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   Help! Processing Won't Start!
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fry


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Help! Processing Won't Start!
« on: Feb 21st, 2005, 5:58pm »

PROCESSING WON'T START! NOTHING HAPPENS WHEN I HIT "RUN"!  
 
- on windows, processing probably won't work if you install it inside
  a folder with non-ascii characters in its name. for instance, if the
  name of your user folder uses japanese text, or it has an umlaut or
  cedilla or anything else fancy, and processing is on the desktop, or
  somewhere inside that folder, you're gonna have trouble. the fix is
  to place processing inside the root level of your C:\ drive (or
  whatever drive you use) and it'll be ok again. this will be fixed in
  the future.
  http://processing.org/discourse/yabb/board_Proce55ing_software__bugs_action_display_num_1062794781.html
  http://processing.org/discourse/yabb/board_Proce55ing_software__bugs_action_display_num_1067764732.html
 
- windows.. if you have lots of garbage in your CLASSPATH environment
  variable, that might cause trouble starting up a sketch. you might
  get "Couldn't find package xxx.xxx" errors. clean things up (avoid
  spaces and quotes)
  http://processing.org/discourse/yabb/board_BugFixes_action_disp_lay_num_1096302833.html
 
- windows.. in general, perhaps avoid having spaces in the folder name
  that contains processing. this is because of windows' awesome
  hokiness and its not-as-distant-as-it-should-be ancestor DOS.
  http://processing.org/discourse/yabb/board_Proce55ing_software__bugs_action_display_num_1094148057.html
 
- windows.. if you're still having trouble, disable any overly
  protective virus scanning software. it might be holding things up.
 
- windows.. you might also try using run.bat to start processing. lots
  of people seem to have a better time with this method.
 
- any platform.. errors inside code that is outside of setup() or
  loop(), for instance this code:
  BFont font = loadFont("blah.vlw");
  void setup {
    // something fancy
  }
  may just hang/freeze processing if "blah.vlw" is not in the "data"
  folder. in general, a better practice is to use loadFont() (and
  loadImage and the rest) inside setup().
 
- on 50% of machines, there still seems to be a bug that causes the
  application to hang completely when something that uses a library
  (or a code folder) is run. symptom will be a non-responsive applet
  that either never shows up, or shows up but never draws (perhaps
  until you hit stop) or draws three frames and then dies. this will
  only happen with applets that have a "coffee cup" icon in the
  window (that's how you know it's running externally).
 
fry


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Re: Help! Processing Won't Start!
« Reply #1 on: Mar 15th, 2005, 2:54pm »

If you get an error that says "java virtual machine launcher: couldn't find the main class. program will exit!" it may be because you need to install QuickTime for Java. Instructions are here:
http://processing.org/discourse/yabb/board_Proce55ing_software__bugs_action_display_num_1085150136.html
 
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