VS Arduino - Error when linking ESP32 project - The filename or extension is too long

Mar 20^th, 2026 at 5:38pm (UTC)

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VS Arduino › Visual Micro › Installation & Troubleshooting › Error when linking ESP32 project - The filename or extension is too long

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Error when linking ESP32 project - The filename or extension is too long (Read 3007 times)

LakeSurfer Newbies Offline Posts: 6 Joined: Dec 7^th, 2022	Error when linking ESP32 project - The filename or extension is too long Jan 11^th, 2024 at 3:46am	Print Post
	I updated to the latest version of VMicro this morning and now my project fails to link after compilation. The resulting link command is over 35k characters, so Windows does not allow the command. I've searched the web for a solution, but none of the recommendations I have found seem to work. Did your link command generation change in the latest release? The filename or extension is too long Error linking for board ESP32 Dev Module(esp32_esp32) Build failed for project 'PoseidonSurfSystem.MainController'

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Simon@Visual Micro Administrator Offline Posts: 2867 Joined: Feb 13^th, 2019	Re: Error when linking ESP32 project - The filename or extension is too long Reply #1 - Jan 11^th, 2024 at 10:36am	Print Post
	Thanks for the report. We did make a change to the linking in the latest release, though from your logs this has not kicked in, so it should be compiling as it did previously. The change should ensure the error does not happen, and you can force this functionality by adding a Local Board.txt to your project (vMicro > Add Code > Add Local Board.txt) and pasting in the below line: vm.linker.dot_a_create=true If that fails can you attach the build output for us to review?
	« Last Edit: Jan 11^th, 2024 at 3:11pm by Simon@Visual Micro »

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LakeSurfer Newbies Offline Posts: 6 Joined: Dec 7^th, 2022	Re: Error when linking ESP32 project - The filename or extension is too long Reply #2 - Jan 11^th, 2024 at 3:22pm	Print Post
	The 12/12/23 build did fix the issue. The link command is now down to ~18k.


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Simon@Visual Micro Administrator Offline Posts: 2867 Joined: Feb 13^th, 2019	Re: Error when linking ESP32 project - The filename or extension is too long Reply #3 - Jan 11^th, 2024 at 3:23pm	Print Post
	Can you attach the full build output from the successful build as well so we can review?


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LakeSurfer Newbies Offline Posts: 6 Joined: Dec 7^th, 2022	Re: Error when linking ESP32 project - The filename or extension is too long Reply #4 - Jan 11^th, 2024 at 4:15pm	Print Post
	I received an "Internal Server Error" when I tried to attach the log file. Now the option to attach any file at all is missing. Do you have another way I can send it to you?


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Simon@Visual Micro Administrator Offline Posts: 2867 Joined: Feb 13^th, 2019	Re: Error when linking ESP32 project - The filename or extension is too long Reply #5 - Jan 11^th, 2024 at 4:21pm	Print Post
	If you email it to info{at}visualmicro.com, and put a link to this thread in the email we will be able to review it.


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Simon@Visual Micro Administrator Offline Posts: 2867 Joined: Feb 13^th, 2019	Re: Error when linking ESP32 project - The filename or extension is too long Reply #6 - Jan 12^th, 2024 at 8:40am	Print Post
	Thanks for the logs, we have fixed this issue in the latest version (24.0102.03) which is available from the top of the below board: https://www.visualmicro.com/forums/YaBB.pl?board=VS_ARDUINO_EXT_RELEASES


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