SuperLab 4.0.4 Known Issue
Cannot Add More Blocks, Trials, or Events
Last Revision: October 1, 2007

There is a bug in SuperLab for Windows 4.0.4 that causes a crash when adding new blocks, trials, or events.  The Mac version is not affected.

This bug has been fixed in SuperLab 4.0.5, released October 4, 2007.

What Trips This Bug

As you add blocks, trials, and events, at some point they can no longer be all visible at the same time and SuperLab will need to create a vertical scroll bar.  That's when the crash happens.  In the screen snapshot below, adding a new trial "t8" will cause the crash.

How to Get Around It

It is possible to work around this bug until a fix becomes available.  To do so:

• Add blocks, trials, or events until the listbox (surrounded by the orange rectangle) is almost full but the scroll bar has not appeared yet

• Resize the window so that it is smaller vertically

• Keep adding blocks, trials, or events

Once the vertical scroll bar has been created, you can continue creating as many blocks, trials, and events as you need to.

What Happened?

In SuperLab 4.0.3 and earlier versions, the program slowed down significantly when a user had a few hundred trials.  In some cases, clicking on the blue checkbox would take over 30 seconds.  The way SuperLab displays blocks, trials, and events as well as the way it handles mouse clicks on the blue checkboxes was completely rewritten from scratch in version 4.0.4, eliminating all delays.  Unfortunately, the bug described in this tech note was inadvertently introduced.