images\purify_sml.gifjust-in-time (JIT) debugging

For runtime error detection, a feature that checks for warnings or errors immediately before each instruction is executed, and gives you the opportunity to launch the debugger and investigate before an instruction corrupts, overwrites, or generates an exception.

Use the Break on Error tool to, in effect, set breakpoints at any time while running an instrumented program. If the program is already running under the debugger, control is returned to the debugger so you can investigate the cause of the error. If the program is not already running under the debugger, the system's Application Error dialog box is displayed. You can click OK to terminate the program, thus ending the current run, or click Cancel to display the debugger.

(C) Copyright IBM Corporation 1993, 2009.