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Chapter 4 Executing and Debugging VIs and SubVIs Debugging VIs This section covers a range of solutions to errors and problems in virtual instruments. Fixing Broken VIs A VI cannot compile or run if it is broken. The VI Run button typically appears broken while you are creating or editing it, until you wire all the icons in the diagram. If it still is broken after you finish wiring the icons, try selecting Edit»Remove Bad Wires or selecting <Ctrl-b> (Windows); <command-b> (Macintosh); <meta-b> (Sun); or <Alt-b> (HP-UX). Often, this fixes a broken VI. Broken Run button Warning button To find out why a VI is broken, click the Broken Run button. An Error List window appears listing all the errors. This window is shown in the following illustration. You also can access this box by clicking the Warning button of a VI, or by selecting Windows»Show Error List. The Warning button for a VI is only visible if the VI has a warning (such as overlapping objects) and you check Show Warnings in the Error List window. Use the Preferences dialog box to configure G to show warnings by default. To locate an error, double-click the text describing it. The error is displayed by bringing the relevant window to the front and highlighting the object © National Instruments Corporation 4-9 G Programming Reference Manual
