Hello, I have this error and can not fix. Please help. Arduino: 1.8.16 (Windows Store 1.8.51.0) (Windows 10), Board: "Arduino Mega or Mega 2560, ATmega2560 (Mega 2560)" C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.51.0_x86__mdqgnx93n4wtt\arduino-builder -dump-prefs -logger=machine -hardw…

To restate the previous reply, you appear to have two files in the sketch folder: PultruStat_ver_1.5.ino PultruStat_ver_1.6 - GF-PA6.ino The Arduino IDE will combine all the sketch files within the folder together before compiling, so it is seeing lots of things that are defined twice.

Help! Error compiling for board Arduino Mega or Mega 2560

Development Tools IDE 1.x

lelowijnands October 13, 2021, 12:52pm 10

Thanks a lot!

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Help! Error compiling for board Arduino Mega or Mega 2560

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