Arduino: 1.8.8 (Windows 10), TD: 1.45, Board: "Teensy 3.6, Serial" In file included from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:34:0, Multiple libraries were found for "SD.h" from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/wiring.h:38, Used: C:\Arduino1.8.8\hardware\teensy\avr\libraries\SD from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/WProgram.h:45, Not used: C:\Arduino1.8.8\libraries\SD from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/Arduino.h:6, from C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl_Ver0.91a.ino.cpp:1: C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:764:12: error: operator '==' has no left operand #if (F_CPU == 256000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:771:14: error: operator '==' has no left operand #elif (F_CPU == 240000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:779:14: error: operator '==' has no left operand #elif (F_CPU == 216000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:787:14: error: operator '==' has no left operand #elif (F_CPU == 192000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:795:14: error: operator '==' has no left operand #elif (F_CPU == 180000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:802:14: error: operator '==' has no left operand #elif (F_CPU == 168000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:806:14: error: operator '==' has no left operand #elif (F_CPU == 144000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:813:14: error: operator '==' has no left operand #elif (F_CPU == 120000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:820:14: error: operator '==' has no left operand #elif (F_CPU == 96000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:827:14: error: operator '==' has no left operand #elif (F_CPU == 72000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:834:14: error: operator '==' has no left operand #elif (F_CPU == 48000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:842:14: error: operator '==' has no left operand #elif (F_CPU == 24000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:846:14: error: operator '==' has no left operand #elif (F_CPU == 16000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:850:14: error: operator '==' has no left operand #elif (F_CPU == 8000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:854:14: error: operator '==' has no left operand #elif (F_CPU == 4000000) ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:858:14: error: operator '==' has no left operand #elif (F_CPU == 2000000) ^ In file included from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:34:0, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/wiring.h:38, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/WProgram.h:45, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/Arduino.h:6, from C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl_Ver0.91a.ino.cpp:1: C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/kinetis.h:5736:41: error: operator '&&' has no right operand #if defined(HAS_KINETIS_HSRUN) && F_CPU > 120000000 ^ In file included from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:35:0, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/wiring.h:38, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/WProgram.h:45, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/Arduino.h:6, from C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl_Ver0.91a.ino.cpp:1: C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/pins_arduino.h:260:11: error: operator '>=' has no left operand #if F_CPU >= 20000000 && !defined(USB_DISABLED) ^ In file included from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/wiring.h:38:0, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/WProgram.h:45, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/Arduino.h:6, from C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl_Ver0.91a.ino.cpp:1: C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2026:11: error: operator '==' has no left operand #if F_CPU == 256000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2028:13: error: operator '==' has no left operand #elif F_CPU == 240000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2030:13: error: operator '==' has no left operand #elif F_CPU == 216000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2032:13: error: operator '==' has no left operand #elif F_CPU == 192000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2034:13: error: operator '==' has no left operand #elif F_CPU == 180000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2036:13: error: operator '==' has no left operand #elif F_CPU == 168000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2038:13: error: operator '==' has no left operand #elif F_CPU == 144000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2040:13: error: operator '==' has no left operand #elif F_CPU == 120000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2042:13: error: operator '==' has no left operand #elif F_CPU == 96000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2044:13: error: operator '==' has no left operand #elif F_CPU == 72000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2046:13: error: operator '==' has no left operand #elif F_CPU == 48000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2048:13: error: operator '==' has no left operand #elif F_CPU == 24000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2050:13: error: operator '==' has no left operand #elif F_CPU == 16000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2052:13: error: operator '==' has no left operand #elif F_CPU == 8000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2054:13: error: operator '==' has no left operand #elif F_CPU == 4000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2056:13: error: operator '==' has no left operand #elif F_CPU == 2000000 ^ C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/core_pins.h:2063:11: error: operator '<' has no left operand #if F_CPU < 24000000 ^ In file included from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/WProgram.h:54:0, from C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/Arduino.h:6, from C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl_Ver0.91a.ino.cpp:1: C:\Arduino1.8.8\hardware\teensy\avr\cores\teensy3/usb_serial.h:40:11: error: operator '>=' has no left operand #if F_CPU >= 20000000 && !defined(USB_DISABLED) ^ In file included from C:\JackALSourceCode\JackAl_Ver0.91a\JackAl_Ver0.91a.ino:73:0: C:\Users\dave\AppData\Local\Temp\arduino_build_186874\sketch\JackAl.h:22:68: fatal error: Rotary.h: No such file or directory compilation terminated. Error compiling for board Teensy 3.6. This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.