I still get the error even though I run Verify/Compile In file included from C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:31:0: sketch\OpenCat.h: In member function 'void Motion::loadDataFromI2cEeprom(unsigned int&)': sketch\OpenCat.h:559:51: warning: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the second: Wire.requestFrom(DEVICE_ADDRESS, skillHeader); ^ In file included from sketch\OpenCat.h:85:0, from C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:31: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\hardware\arduino\avr\libraries\Wire\src/Wire.h:68:13: note: candidate 1: uint8_t TwoWire::requestFrom(int, int) uint8_t requestFrom(int, int); ^~~~~~~~~~~ C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.42.0_x86__mdqgnx93n4wtt\hardware\arduino\avr\libraries\Wire\src/Wire.h:65:13: note: candidate 2: uint8_t TwoWire::requestFrom(uint8_t, uint8_t) uint8_t requestFrom(uint8_t, uint8_t); ^~~~~~~~~~~ In file included from C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:31:0: sketch\OpenCat.h: At global scope: sketch\OpenCat.h:753:1: warning: narrowing conversion of '-9.0e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] }; ^ sketch\OpenCat.h:753:1: warning: narrowing conversion of '2.25e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '-9.0e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '2.25e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '-9.0e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '-2.25e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '-9.0e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] sketch\OpenCat.h:753:1: warning: narrowing conversion of '-2.25e+1' from 'double' to 'int8_t {aka signed char}' inside { } [-Wnarrowing] C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino: In function 'void setup()': C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:254:34: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] motion.loadBySkillName("rest"); ^ C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino: In function 'void loop()': C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:361:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] skillByName("rest"); ^ C:\Users\willw\Documents\Arduino\OpenCat\WriteInstinct\WriteInstinct.ino:400:45: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] motion.loadBySkillName("calib"); ^ Sketch uses 25758 bytes (79%) of program storage space. Maximum is 32256 bytes. Global variables use 1372 bytes (66%) of dynamic memory, leaving 676 bytes for local variables. Maximum is 2048 bytes.