Debugging Scripts

Debugging scripts currently is not easy. PCC does not have an integrated development environment, so you have to edit scripts outside PCC; and there is not (yet) a way to inspect and manipulate a running script.

When your script dies with an error, you usually get a message on the console, or (when you started the script using [Alt-R]) a message box. In addition, a backtrace will be printed on the console. The backtrace will contain the following information:

• in the top line, the line number and subroutine name where the error occurred;
• in following lines, the line number and subroutine name which called the offending routine.

Note that line numbers will be relative to the start of the subroutine, not the start of the file it was defined in. Scripts executed with `Load' will be shown as "`Load'ed script". Subroutines and scripts which suspended in an earlier session may be reported as "unknown".

I know this is not much, but I hope it helps at least a bit to debug your scripts.