Arduino Simulink - No rule to make target MW_arduino_digitalio.cpp

Hi all. I am having a very wierd issue where my Simulink model will deploy to the Arduino correcty if I am inside a subfolder and will not deploy if the model is in the main folder. Everything resides inside a matlab project currently. There are no spaces in the folder names anywhere (I checked for that already).

Can someone help me figure out what is happening here, please? Error message is below (lightly edited so it isn't 2700 chars long...

"C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/tools/avr/bin/avr-g++" 
-std=gnu++11 
-fpermissive 
-fno-exceptions 
-fno-threadsafe-statics 
-c 
-w 
-ffunction-sections 
-fdata-sections 
-MMD 
-DARDUINO=10801 
-MMD 
-MP 
-MF"MW_arduinoI2C.dep" 
-MT"MW_arduinoI2C.o" 
-Os 
-mmcu=atmega328p 
-DF_CPU=16000000L 
-DARDUINO_AVR_UNO 
-DARDUINO_ARCH_AVR 
-D_RUNONTARGETHARDWARE_BUILD_ 
-D_RTT_USE_SERIAL0_ 
-DMODEL=topLevel 
-DNUMST=1 
-DNCSTATES=0 
-DHAVESTDIO 
-DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 
-DCLASSIC_INTERFACE=0 
-DALLOCATIONFCN=0 
-DTID01EQ=0 
-DONESTEPFCN=1 
-DTERMFCN=1 
-DMULTI_INSTANCE_CODE=0 
-DINTEGER_CODE=0 
-DMT=0 
-DXCP_CUSTOM_PLATFORM 
-DEXIT_FAILURE=1 
-DEXTMODE_DISABLEPRINTF 
-DEXTMODE_DISABLETESTING 
-DEXTMODE_DISABLE_ARGS_PROCESSING=1 
-DSTACK_SIZE=64 
-D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ 
-DRT 
-DMW_TIMERID=1 
-DMW_PRESCALAR=256 
-DMW_TIMERCOUNT=59286 
-DMW_SCHEDULERCOUNTER=1 
-D_RTT_BAUDRATE_SERIAL0_=9600 
-D_RTT_ANALOG_REF_=0 
-DCLASSIC_INTERFACE=0 
-DALLOCATIONFCN=0 
-DONESTEPFCN=1 
-DTERMFCN=1 
-DMULTI_INSTANCE_CODE=0 
-DINTEGER_CODE=0
-DMT=0  
-DTID01EQ=0 
-DXCP_CUSTOM_PLATFORM 
-DEXIT_FAILURE=1 
-DEXTMODE_DISABLEPRINTF 
-DEXTMODE_DISABLETESTING 
-DEXTMODE_DISABLE_ARGS_PROCESSING=1 
-DSTACK_SIZE=64 
-DRT 
-DMODEL=topLevel 
-DNUMST=1 
-DNCSTATES=0 
-DHAVESTDIO 
-DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 
-ID:/Documents/MSE/Projects/FloatSat/matlab/rawCode 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/shared/svd/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~2/include 
-ID:/Documents/MSE/Projects/FloatSat/matlab/rawCode/topLevel_ert_rtw 
-IE:/extern/include 
-IE:/simulink/include 
-IE:/rtw/c/src 
-IE:/rtw/c/src/ext_mode/common 
-IE:/rtw/c/ert 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/arduino/avr/cores/arduino 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/arduino/avr/variants/standard 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/libraries/Servo/src 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~1/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~1/SCHEDU~1/include 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/tools/avr/avr/include/avr 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/shared/EXTERN~1/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/3P778C~1.INS/ARDUIN~1.INS/hardware/arduino/avr/LIBRAR~1/Wire/src 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/3P778C~1.INS/ARDUIN~1.INS/hardware/arduino/avr/LIBRAR~1/Wire/src/utility 
-o "MW_arduinoI2C.o" "C:/ProgramData/MATLAB/SupportPackages/R2019b/toolbox/target/supportpackages/arduinobase/src/MW_arduinoI2C.cpp"

"C:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/tools/avr/bin/avr-g++" 
-std=gnu++11 
-fpermissive 
-fno-exceptions 
-fno-threadsafe-statics 
-c 
-w 
-ffunction-sections 
-fdata-sections 
-MMD 
-DARDUINO=10801 
-MMD 
-MP 
-MF"MW_SerialWrite.dep" 
-MT"MW_SerialWrite.o" 
-Os 
-mmcu=atmega328p 
-DF_CPU=16000000L 
-DARDUINO_AVR_UNO 
-DARDUINO_ARCH_AVR 
-D_RUNONTARGETHARDWARE_BUILD_ 
-D_RTT_USE_SERIAL0_ 
-DMODEL=topLevel 
-DNUMST=1 
-DNCSTATES=0 
-DHAVESTDIO 
-DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 
-DCLASSIC_INTERFACE=0 
-DALLOCATIONFCN=0 
-DTID01EQ=0 
-DONESTEPFCN=1 
-DTERMFCN=1 
-DMULTI_INSTANCE_CODE=0 
-DINTEGER_CODE=0 
-DMT=0 
-DXCP_CUSTOM_PLATFORM 
-DEXIT_FAILURE=1 
-DEXTMODE_DISABLEPRINTF 
-DEXTMODE_DISABLETESTING 
-DEXTMODE_DISABLE_ARGS_PROCESSING=1 
-DSTACK_SIZE=64 
-D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ 
-DRT 
-DMW_TIMERID=1 
-DMW_PRESCALAR=256 
-DMW_TIMERCOUNT=59286 
-DMW_SCHEDULERCOUNTER=1 
-D_RTT_BAUDRATE_SERIAL0_=9600 
-D_RTT_ANALOG_REF_=0 
-DCLASSIC_INTERFACE=0 
-DALLOCATIONFCN=0 
-DONESTEPFCN=1 
-DTERMFCN=1 
-DMULTI_INSTANCE_CODE=0 
-DINTEGER_CODE=0 
-DMT=0  
-DTID01EQ=0 
-DXCP_CUSTOM_PLATFORM 
-DEXIT_FAILURE=1 
-DEXTMODE_DISABLEPRINTF 
-DEXTMODE_DISABLETESTING 
-DEXTMODE_DISABLE_ARGS_PROCESSING=1 
-DSTACK_SIZE=64 
-DRT 
-DMODEL=topLevel 
-DNUMST=1 
-DNCSTATES=0 
-DHAVESTDIO 
-DMODEL_HAS_DYNAMICALLY_LOADED_SFCNS=0 
-ID:/Documents/MSE/Projects/FloatSat/matlab/rawCode 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/shared/svd/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~2/include 
-ID:/Documents/MSE/Projects/FloatSat/matlab/rawCode/topLevel_ert_rtw 
-IE:/extern/include 
-IE:/simulink/include 
-IE:/rtw/c/src 
-IE:/rtw/c/src/ext_mode/common 
-IE:/rtw/c/ert 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/arduino/avr/cores/arduino 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/arduino/avr/variants/standard 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/libraries/Servo/src 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~1/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/SUPPOR~1/ARDUIN~1/SCHEDU~1/include 
-IC:/ProgramData/MATLAB/SupportPackages/R2019b/3P.instrset/arduinoide.instrset/hardware/tools/avr/avr/include/avr 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/toolbox/target/shared/EXTERN~1/include 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/3P778C~1.INS/ARDUIN~1.INS/hardware/arduino/avr/LIBRAR~1/Wire/src 
-IC:/PROGRA~3/MATLAB/SUPPOR~1/R2019b/3P778C~1.INS/ARDUIN~1.INS/hardware/arduino/avr/LIBRAR~1/Wire/src/utility 
-o "MW_SerialWrite.o" "C:/ProgramData/MATLAB/SupportPackages/R2019b/toolbox/target/supportpackages/arduinobase/src/MW_SerialWrite.cpp"

gmake: *** No rule to make target `C:/ProgramData/MATLAB/SupportPackages/R2019a/toolbox/target/supportpackages/arduinobase/src/MW_arduino_digitalio.cpp', needed by `MW_arduino_digitalio.o'.  Stop.
The make command returned an error of 2

Error(s) encountered while building "topLevel":
### Failed to generate all binary outputs.

[Arun Kumar]

Hi Richard,

Please contact MathWorks Technical Support.

[Jesse Chen]

This is very likely bacuase you didn't delete the files generated by 19a. Try deleting all files generated by 19a, or do the codegen in a new folder.

[Abhishek Kumar Shastry]

Thank you jesse!! this solved my problem. It was similar, would you mind creating a clear button in matlab to clear all the generated code, so that future users do not have to go through this.