Scripting Guide - SAS

Chapter 4 Scripting Tools 63
Debug Scripts
• Click to remove all watches.
Modify Preferences in Debugger
The Debugger lets you change preferences as you work in the Debugger. Select the Options tab to find the
following settings:
Show Line Numbers
Shows or hides the line numbers for the script in the Debugger.
Break on Multiple Statements Per Line
line.
Stops executing the script between each expression in a single
Break On Throw Breaks when the script executes the Throw() function. For example, Throw() might
be enclosed in a Try() expression. The Debugger breaks on Throw() instead of continuing through
the rest of the expression. This lets you identify where the problem occurred in the script and then
return to debugging.
Break On Execution Error
Debugger.
Stops executing the script when the error occurs rather than closing the
Warn On Assignment In Condition Shows a warning when you enter a breakpoint condition that
contains the assignment. For example, if you have a breakpoint on x = 1 and add the condition x = 1
to the breakpoint, you are prompted to verify the assignment of x.
Persistent Debugger Sessions
JMP saves all breakpoints and watches until you delete them. Other user-specific settings, such as column
widths on the tabs and the Debugger window size, persist between sessions of JMP.
These settings are stored in a file named JMP.jdeb, the location of which is defined in the USER_APPDATA
variable:
• Windows 7 and Vista: "/C:/Users//AppData\Local/SAS/JMP//"
• Windows XP: "/C:/Documents and Settings//Local Settings/Application Data/SAS/JMP/
/"
• Macintosh: "/Users//Library/Application Support/JMP//"
As usual, the values of local variables, global variables, and namespaces clear when you close and
reopen JMP.
Examples of Debugging Scripts
This section includes examples of setting breakpoints to watch variables; stepping into, over, and out of
expressions; watching variables in different scopes and namespaces; and debugging interactive scripts.
Example scripts are located in the Samples/Scripts folder.
Tip: Make sure that Show Line Numbers is selected on the Debugger Options tab before proceeding.