If any of the following situations occur, please be sure to submit a bug report online. Please include the net that caused the problem, and include a description of the situation that led to the problem.
You encounter an exception that has a name that starts with CPN'.
You encounter an error that is indicated by red auras (described under graphical feedback) but that does not have a error message in a speech bubble. In other words, an error has been found, but no information is provided for correcting the error.
Bug reports should be submitted for all kinds of problems, but it is particularly important that the problems mentioned above are brought to the attention of the developers.