VS Arduino - Cannot resolve symbol '__progmem_

Dec 28^th, 2025 at 3:04am (UTC)

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VS Arduino › Visual Micro › Visual Studio 2019, 2022, 2026 › Cannot resolve symbol '__progmem__'

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Cannot resolve symbol '__progmem__' (Read 2875 times)

Lee Critchlow Junior Member Offline Posts: 30 Location: TN Joined: Jul 19^th, 2022	Cannot resolve symbol '__progmem__' Aug 20^th, 2023 at 1:42pm	Print Post
	Using println(F(" No Data")) is reporting that it Cannot resolve symbol '__progmem__' The program compile, uploads, and executes. How can I eliminate this error?


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Tim@Visual Micro Administrator Offline Posts: 12204 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Cannot resolve symbol '__progmem__' Reply #1 - Aug 20^th, 2023 at 1:55pm	Print Post
	Does the name of the project show in the solution explorer suffixed by the text "(Arduino)"? If not then click the vMicro>Convert button to use the newer intellisense engine. Otherwise, please post the information that we have requested.


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Lee Critchlow Junior Member Offline Posts: 30 Location: TN Joined: Jul 19^th, 2022	Re: Cannot resolve symbol '__progmem__' Reply #2 - Aug 20^th, 2023 at 2:14pm	Print Post
	"(Arduino)" is shown after the project. Please find attached the build output.

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Tim@Visual Micro Administrator Offline Posts: 12204 Location: United Kingdom Joined: Apr 10^th, 2010	Re: Cannot resolve symbol '__progmem__' Reply #3 - Aug 20^th, 2023 at 2:39pm	Print Post
	What is the full line of code? It is possible the __progmem__ source is not available to intellisense. In that case we can explain how to add an intellisense definition.


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Lee Critchlow Junior Member Offline Posts: 30 Location: TN Joined: Jul 19^th, 2022	Re: Cannot resolve symbol '__progmem__' Reply #4 - Aug 20^th, 2023 at 2:42pm	Print Post
	ssdDisplay.println(F(" No Data"));


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Simon@Visual Micro Administrator Offline Posts: 2826 Joined: Feb 13^th, 2019	Re: Cannot resolve symbol '__progmem__' Reply #5 - Aug 22^nd, 2023 at 8:36am	Print Post
	Thanks for the detail. Can you try closing the solution and deleting the ".vs" folder from the solution, then reopening it again? If this still shows the error could you attach or email us your VCXPROJ file, or if possible the entire project for us to investigate further?


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Simon@Visual Micro Administrator Offline Posts: 2826 Joined: Feb 13^th, 2019	Re: Cannot resolve symbol '__progmem__' Reply #6 - Aug 22^nd, 2023 at 4:54pm	Print Post
	Thanks for the project. Can you try running Build > Clean Solution and then building the project again? Also, do you get the same error when using the Flash String Helper in a Serial.println(F("Something")); statement?


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Lee Critchlow Junior Member Offline Posts: 30 Location: TN Joined: Jul 19^th, 2022	Re: Cannot resolve symbol '__progmem__' Reply #7 - Aug 22^nd, 2023 at 5:05pm	Print Post
	It appears to be a ReSharper problem. When I suspend ReSharper the red squiggles go away.


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Simon@Visual Micro Administrator Offline Posts: 2826 Joined: Feb 13^th, 2019	Re: Cannot resolve symbol '__progmem__' Reply #8 - Aug 23^rd, 2023 at 12:17pm	Print Post
	Thanks for the update. Out of interest, does the below .editorconfig help to avoid these issues showing when using both Re-sharper and Visual Micro? https://stackoverflow.com/a/70869752


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