About Checking for Syntax Errors (Visual LISP IDE)

The Visual LISP text editor window provides some syntax checking capabilities that can be performed before executing an AutoLISP program.

The syntax errors that can be detected from the text editor window are:

• Incorrect number of arguments supplied to a known function
• Invalid variable name passed to a function (for example, a quoted symbol where a variable is required)
• Incorrect syntax in special form function calls (for example, lambda, setq, and foreach)

Some syntax errors can only be determined at runtime. For example, if you call a function that expects an integer argument and you supply a string, AutoLISP does not detect this until run-time. As a result, this error will not be detected until the program is executed.