Examples

To stop execution the tenth time in function foo and print a:

stop in foo {print a} after 10

To stop at line 17 of file bar if a is equal to 0:

stop at "bar":17 if a == 0

To stop whenever a changes:

stop a

To stop the third time a equals 5:

stop if a .eq. 5 after 3

To print a and do a stack trace every time the program stops execution:

when stopped {print a; where}