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Alice 2 Known Bugs

This version was saved 10 years, 10 months ago View current version     Page history
Saved by Don Slater
on May 17, 2013 at 8:26:04 am
 

This page will continue to be updated. Any suggestions for questions to be included are welcome. Send your thoughts to  Suggestions

 

  • Tutorial Related 
    • The fourth tutorial in Alice 2.x, page 19 (adding the beach chair into the scene), shows an error, even when the chair is added correctly. It is possible to bypass the error message by clicking on next in the tutorial navigation window, and continuing through the rest of the tutorial.
    • On Page 69 of the Penguin Tutorial, if you click on the black space above and below the picture, Alice throws an error
    • Starting tutorials with the Properties or Functions tab in focus in the World's details will cause the tutorials to break

     

  • Using the File menu: Export Video command does not always work -- Under investigation
    •  There is a file menu option for exporting an Alice world to video. This option works well if there are no sound clips in the animation. Unfortunately with sound, our exporter does not recognize that an animation may be over, because the background music may still be playing. For example, if I have a 45 second animation, but I am using as background music a 3 minute and 15 second sound clip, then our exporter will want to record all 3 minutes and 15 seconds. We are working on resolving this problem at the present time.

 

 

  • Sound-related
    • Alice can play most but not all mp3 and wav files
    • Open your sound file in an audio editor, such as Audacity, and resave your file as either a .wav or a .mp3. If for some reason the .mp3 still does not work, save the file as a .wav. 

 

  • Export as a web page-related:
    • Export as a web-page menu will work on the Internet Explorer browser and on those browsers that have the latest version of the Java Runtime Edition plugin installed for that browser. The exception to this is the latest version of Firefox, which does not yet have an updated JRE.

 

  • Object tree behavior 
    • When dealing with a character like Girl, my students accidentally drag a subpart off the main character when selecting it in the object tree. When they do this it creates a separate object for that subpart and disassociates it from the Girl. Is there an easy way to reattach the separated arm back to the girl in the object tree? Appreciate any advice.
      --Clayton Ruff, Instructor, Pulaski Technical College.

      •  If this happens, the arm acts like it is still attached to the body. (For example, turn the girl, the arm still turns with it.) Also, creating a "right arm move" command in my first method, will appear as right arm move and not girl.body.right arm move. The world can be saved and reloaded, although this does not rebuild the object tree. It seems that this bug does not create big problems for the actual execution of the world. Let us know if your experience is different.

      • However, the arm cannot be cannot "reattached" to the appropriate location in the object hierarchy of object tree, although the object thinks the arm is still attached.

      • One work around, is to right-click in the object tree section of the Alice IDE - not on any particular object - and select the "create new group". This will create a folder in the object tree, which can be renamed, and the object, and all of the "detached" parts, can be moved into this folder. This will have no affect on any code that is already created.

  

  • Miscellaneous:
    • Alice does not handle large worlds (in terms of hard disk space) well
    • Alice gradually slows down after continued use
    • There are times when Alice "lags" because the computer operating system is performing other tasks / housekeeping. When this happens it is possible that an object may be added from the gallery to a scene, and yet the object tree will not be updated to reflect the addition. When you add an object to a scene, take time to make sure that the appropriate tile is also added to the object tree. If not, save your world as a new version, quit Alice, restart Alice, and attempt to reopen the worlkd you just saved. If it does not open, then open an older version of the world.
    • Some rules of thumb:
      • Save your worlds often
      • Save multiple versions of your world (i.e. world_v1, world_v2, world_v3 and so on)
      • It is not a bad idea to quit Alice and restart every couple of hours. 

 

Copyright

 

Go to Alice.org home page

 

 

 

 

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