I ran the simplest model on arduino board and I still have this error. can someone please help me

### Starting build procedure for model: light_sensor
 Code Generation  1
Elapsed: 5 sec
### Generating code into build folder: C:\Users\Ulrich\Documents\MATLAB\light_sensor_ert_rtw
### Invoking Target Language Compiler on light_sensor.rtw
### Using System Target File: C:\Program Files\MATLAB\R2015b\rtw\c\ert\ert.tlc
### Loading TLC function libraries
### Initial pass through model to cache user defined code
### Caching model source code
### Writing header file light_sensor.h
### Writing header file light_sensor_types.h
### Writing header file rtwtypes.h
### Writing source file light_sensor.c
### Writing header file light_sensor_private.h
.
### Writing source file light_sensor_data.c
### Writing source file ert_main.c
### TLC code generation complete.
### Creating project marker file: rtw_proj.tmw
### Evaluating PostCodeGenCommand specified in the model
### Using toolchain: Arduino AVR v1.6.1 | gmake (64-bit Windows)
### 'C:\Users\Ulrich\Documents\MATLAB\light_sensor_ert_rtw\light_sensor.mk' is up to date
### Building 'light_sensor': C:\PROGRA~1\MATLAB\R2015b\bin\win64\gmake -f light_sensor.mk all
C:/MATLAB/SupportPackages/R2015b/arduino-1.6.1/hardware/tools/avr/bin/avr-gcc -c -g -w -ffunction-sections -fdata-sections -MMD -DARDUINO=10601 -Os -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR -D_RUNONTARGETHARDWARE_BUILD_ -DMODEL=light_sensor -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DONESTEPFCN=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DTID01EQ=0 -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=1 -DMW_PRESCALAR=1024 -DMW_TIMERCOUNT=49911 -DMW_SCHEDULERCOUNTER=1 -D_RTT_BAUDRATE_SERIAL0_=9600 -D_RTT_ANALOG_REF_=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DTID01EQ=0 -DEXIT_FAILURE=1 -DEXTMODE_DISABLEPRINTF -DEXTMODE_DISABLETESTING -DEXTMODE_DISABLE_ARGS_PROCESSING=1 -DRT -DSTACK_SIZE=64 -DMODEL=light_sensor -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -IC:/MATLAB/SupportPackages/R2015b/arduinobase/toolbox/target/supportpackages/arduinobase/include -IC:/MATLAB/SupportPackages/R2015b/arduinobase/toolbox/target/supportpackages/arduinobase/blocks/sfcn/include -IC:/Users/Ulrich/Documents/MATLAB/light_sensor_ert_rtw -IC:/Users/Ulrich/Documents/MATLAB -ID:/Skool/MATLAB Sessions/Arduino uno -IC:/PROGRA~1/MATLAB/R2015b/extern/include -IC:/PROGRA~1/MATLAB/R2015b/simulink/include -IC:/PROGRA~1/MATLAB/R2015b/rtw/c/src -IC:/PROGRA~1/MATLAB/R2015b/rtw/c/src/ext_mode/common -IC:/PROGRA~1/MATLAB/R2015b/rtw/c/ert -IC:/MATLAB/SupportPackages/R2015b/arduino-1.6.1/hardware/arduino/avr/cores/arduino -IC:/MATLAB/SupportPackages/R2015b/arduino-1.6.1/hardware/arduino/avr/variants/standard -IC:/MATLAB/SupportPackages/R2015b/arduino-1.6.1/libraries/Servo/src -IC:/MATLAB/SupportPackages/R2015b/arduino/toolbox/target/supportpackages/arduinotarget/registry/../include -IC:/MATLAB/SupportPackages/R2015b/arduino/toolbox/target/supportpackages/arduinotarget/registry/../scheduler/include -o "light_sensor.o" "light_sensor.c" 
avr-gcc: error: Sessions/Arduino: No such file or directory 
avr-gcc: error: uno: No such file or directory 
gmake: *** [light_sensor.o] Error 1
### Build procedure for model: 'light_sensor' aborted due to an error.
Error(s) encountered while building "light_sensor":
### Failed to generate all binary outputs.

Answer 1

[Walter Roberson]

You configured something about your Arduino installation to be put into the directory

D:/Skool/MATLAB Sessions/Arduino uno

You need to change that directory name so that it does not have any spaces in the name.

[Ulrich Mouaffo]

worked but now i get this error

### Build procedure for model: 'light_sensor' aborted due to an error.
No free Timer is available on the target to generate the base rate interrupt which executes the model on the target. All timers are used by Servo and PWM blocks in the model.  

1. PWM pins are mapped to a timer on the target hardware. Refer respective Arduino board documentation for PWM pin mapping to timer. Delete PWM blocks to run the model on the target hardware.  

2. Each group of 12 Servo blocks are mapped to a timer on the target hardware. Servo blocks count ranging from 1 to 12 will use one timer, 13 to 24 will use two timers, 25 to 36 will use three timers and 37 to 48 will use four timers depending on the number of Servos supported by Arduino board type. Delete a specific range of Servo blocks to run the model on the target hardware.

[Walter Roberson]

It looks like you ran out of timer chips.

[Ulrich Mouaffo]

And how am i supposed to solve this?

[Walter Roberson]

Delete PWM blocks, or delete Servo blocks, or switch to an Arduino board that has more timer chips.