VS Arduino - Adding Breakpoint causes program syntax error

Mar 20^th, 2026 at 4:58am (UTC)

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VS Arduino › Visual Micro › Installation & Troubleshooting › Adding Breakpoint causes program syntax error

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Adding Breakpoint causes program syntax error (Read 2380 times)

dbaechtel Newbies Offline Posts: 3 Joined: Jul 5^th, 2023	Adding Breakpoint causes program syntax error Jul 6^th, 2023 at 6:14pm	Print Post
	Attached is the main Loop of my Arduino Uno application. It compiles without error, If I add a Breakpoint to line 398, the VS IDE indicates a syntax error on line 399. If I delete the breakpoint, the syntax error goes away. If I add the breakpoint again, the syntax error comes back. Why does adding a breakpoint cause syntax errors in the program? What is going on with the IDE? BUG. Please Help.

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Tim@Visual Micro Administrator Offline Posts: 12204 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Adding Breakpoint causes program syntax error Reply #1 - Jul 6^th, 2023 at 6:32pm	Print Post
	I assume the syntax error is an error you see during attempt to compile. The serial debugger works differently to the way hardware debug works. Serial debug has to inject code into a hidden temp copy of the code during compilation. It adds code to the end of a line and attempts to navigate braces inside If or Case statements etc. In this case you have set a breakpoint on an If() line and I suspect the comment is causing some confusion. We will test. If that is the problem you can either put the breakpoint the line before the If() or inside/after the opening brace of the if() to debug when the if() resolves to true. In short, the serial debugg allows breakpoints on blank lines, therefore try moving the breakpoint up one line. Does this help ?


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fredcasper Newbies Offline Posts: 1 Joined: Aug 9^th, 2023	Re: Adding Breakpoint causes program syntax error Reply #2 - Aug 11^th, 2023 at 2:48am	Print Post
	Tim@Visual Micro wrote on Jul 6^th, 2023 at 6:32pm: I assume the syntax error is an error you see during attempt to compile. The serial debugger works differently to the way hardware debug works. Serial debug has to inject code into a hidden temp copy of the code during compilation. It adds code to the end of a line and attempts to navigate braces inside If or Case statements etc. In this case you have set a breakpoint on an If() line and I suspect the comment is causing some confusion. We will test. If that is the problem you can either put the breakpoint the line before the If() or inside/after the opening brace of the if() to debug when the if() resolves to true. In short, the serial debugg allows breakpoints on blank lines, therefore try moving the breakpoint up one line. Does this help ? That worked, thanks so much!


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