Binary output error when using PID Controller- Simulink

### Starting build procedure for model: MiniProject2B
 Code Generation  1
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### Generating code into build folder: C:\Users\Patrick\AppData\Local\Temp\fcctemp\MiniProject2B_ert_rtw
### Invoking Target Language Compiler on MiniProject2B.rtw
### Using System Target File: C:\Program Files\MATLAB\R2016b\rtw\c\ert\ert.tlc
### Loading TLC function libraries
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### Initial pass through model to cache user defined code
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### Caching model source code
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### Writing header file MiniProject2B.h
### Writing header file MiniProject2B_types.h
### Writing header file rtwtypes.h
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### Writing header file multiword_types.h
### Writing header file rtGetInf.h
### Writing source file rtGetInf.c
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### Writing header file rtGetNaN.h
### Writing source file rtGetNaN.c
### Writing source file MiniProject2B.c
### Writing header file MiniProject2B_private.h
### Writing source file MiniProject2B_data.c
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### Writing header file rtmodel.h
### Writing source file ert_main.c
### TLC code generation complete.
### Generating TLC interface API.
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### Creating data type transition file MiniProject2B_dt.h
.### Evaluating PostCodeGenCommand specified in the model
### Using toolchain: Arduino AVR v1.6.7 | gmake (64-bit Windows)
### 'C:\Users\Patrick\AppData\Local\Temp\fcctemp\MiniProject2B_ert_rtw\MiniProject2B.mk' is up to date
### Building 'MiniProject2B': C:\PROGRA~1\MATLAB\R2016b\bin\win64\gmake  -f MiniProject2B.mk all
C:/ProgramData/MATLAB/SupportPackages/R2016b/3P.instrset/arduinoide.instrset/arduino-1.6.7/hardware/tools/avr/bin/avr-gcc -c -g -w -ffunction-sections -fdata-sections -MMD -DARDUINO=10607 -MMD -MP -MF"MiniProject2B.dep" -MT"MiniProject2B.o" -Os -mmcu=atmega2560 -DF_CPU=16000000L -DARDUINO_AVR_MEGA2560 -DARDUINO_ARCH_AVR -D_RUNONTARGETHARDWARE_BUILD_ -D_ROTH_MEGA2560_ -DMODEL=MiniProject2B -DNUMST=2 -DNCSTATES=2 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=1 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DRT -DSTACK_SIZE=64 -DMW_TIMERID=5 -DMW_PRESCALAR=256 -DMW_TIMERCOUNT=62411 -DMW_SCHEDULERCOUNTER=1 -D_RTT_BAUDRATE_SERIAL0_=9600 -D_RTT_BAUDRATE_SERIAL1_=9600 -D_RTT_BAUDRATE_SERIAL2_=9600 -D_RTT_BAUDRATE_SERIAL3_=9600 -D_RTT_ANALOG_REF_=2 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=1 -DTID01EQ=1 -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DRT -DSTACK_SIZE=64 -DMODEL=MiniProject2B -DNUMST=2 -DNCSTATES=2 -DHAVESTDIO -IC:/ProgramData/MATLAB/SupportPackages/R2016b/toolbox/target/supportpackages/arduinobase/include -IC:/ProgramData/MATLAB/SupportPackages/R2016b/toolbox/target/supportpackages/arduinobase/blocks/sfcn/include -IC:/Users/Patrick/AppData/Local/Temp/fcctemp/MiniProject2B_ert_rtw -IC:/Users/Patrick/AppData/Local/Temp/fcctemp -IC:/PROGRA~1/MATLAB/R2016b/extern/include -IC:/PROGRA~1/MATLAB/R2016b/simulink/include -IC:/PROGRA~1/MATLAB/R2016b/rtw/c/src -IC:/PROGRA~1/MATLAB/R2016b/rtw/c/src/ext_mode/common -IC:/PROGRA~1/MATLAB/R2016b/rtw/c/ert -IC:/PROGRA~1/MATLAB/R2016b/toolbox/coder/rtiostream/src/utils -IC:/ProgramData/MATLAB/SupportPackages/R2016b/3P.instrset/arduinoide.instrset/arduino-1.6.7/hardware/arduino/avr/cores/arduino -IC:/ProgramData/MATLAB/SupportPackages/R2016b/3P.instrset/arduinoide.instrset/arduino-1.6.7/hardware/arduino/avr/variants/mega -IC:/ProgramData/MATLAB/SupportPackages/R2016b/toolbox/target/supportpackages/arduinotarget/registry/../include -IC:/ProgramData/MATLAB/SupportPackages/R2016b/toolbox/target/supportpackages/arduinotarget/registry/../scheduler/include -o "MiniProject2B.o" "MiniProject2B.c" 
MiniProject2B.c: In function 'MiniProject2B_step': 
MiniProject2B.c:294:1: error: unable to find a register to spill in class 'POINTER_REGS' 
 } 
 ^ 
MiniProject2B.c:294:1: error: this is the insn: 
(insn 684 683 686 45 (set (reg:SF 185 [ D.2972 ]) 
        (mem:SF (post_inc:HI (reg:HI 16 r16 [orig:224 ivtmp.20 ] [224])) [6 MEM[base: _246, offset: 0B]+0 S4 A8])) MiniProject2B.c:111 99 {*movsf} 
     (expr_list:REG_INC (reg:HI 16 r16 [orig:224 ivtmp.20 ] [224]) 
        (nil))) 
MiniProject2B.c:294: confused by earlier errors, bailing out 
gmake: *** [MiniProject2B.o] Error 1 
### Creating HTML report file MiniProject2B_codegen_rpt.html
### Build procedure for model: 'MiniProject2B' aborted due to an error.
Error(s) encountered while building "MiniProject2B":
### Failed to generate all binary outputs.

My simulink model that controls a speed of a fan works perfectly when just using one kp block, there was however a steady state offset in the actual fan speed so i tried to subsitute this individual gain block with a PID controller to get rid off the offset and I am now receiving this error. Does anyone have any ideas on how to fix this?