I got an error when trying to build udp block

I am trying to build a udp block and get this error:

   ### Starting build procedure for model: Free_Flight
 Code Generation  2  5
Elapsed: 12 sec
### Generating code into build folder: C:\Users\kidus.guye\Downloads\SimulinkARDroneTarget-R2016_ab\Build\Free_Flight_ert_rtw
State 'BatteryLow' is not reachable via any of the valid transition paths. [2 similar]
Component:Stateflow | Category:SFLintwarning
Output port 1 of 'Free_Flight/Byte Unpacking 1' is not connected. [2 similar]
Component:Simulink | Category:Blockwarning
Input port 2 of 'Free_Flight/PI controller' is not connected.
Component:Simulink | Category:Blockwarning
### Invoking Target Language Compiler on Free_Flight.rtw
### Using System Target File: C:\Program Files\MATLAB\R2016b\rtw\c\ert\ert.tlc
### Loading TLC function libraries
### Initial pass through model to cache user defined code
### Caching model source code
...............................................................................
...............................................................................
............
### Writing source file Free_Flight.c
### Writing header file Free_Flight_private.h
### Writing header file Free_Flight.h
.
### Writing header file Free_Flight_types.h
### Writing header file rtwtypes.h
### Writing header file multiword_types.h
### Writing header file rt_nonfinite.h
### Writing source file rt_nonfinite.c
.
### Writing header file rtGetInf.h
### Writing source file rtGetInf.c
### Writing header file rtGetNaN.h
### Writing source file rtGetNaN.c
### Writing source file Free_Flight_data.c
.
### Writing header file rtmodel.h
### Writing source file ert_main.c
### TLC code generation complete.
### Generating TLC interface API.
...............................................................................
..........................................................
### Creating data type transition file Free_Flight_dt.h
...### Evaluating PostCodeGenCommand specified in the model
### Using toolchain: Code Sourcery v4.8 | gmake (64-bit Windows)
### 'C:\Users\kidus.guye\Downloads\SimulinkARDroneTarget-R2016_ab\Build\Free_Flight_ert_rtw\Free_Flight.mk' is up to date
### Building 'Free_Flight': C:\PROGRA~1\MATLAB\R2016b\bin\win64\gmake  -f Free_Flight.mk all
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "Free_Flight.o" "Free_Flight.c"
Free_Flight.c: In function 'Free_Flight_step0':
Free_Flight.c:1078:5: warning: implicit declaration of function 'BatteryMeasure_step'
Free_Flight.c: In function 'Free_Flight_initialize':
Free_Flight.c:3069:3: warning: implicit declaration of function 'BatteryMeasure_start'
Free_Flight.c: In function 'Free_Flight_terminate':
Free_Flight.c:3222:3: warning: implicit declaration of function 'BatteryMeasure_term'
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "Free_Flight_data.o" "Free_Flight_data.c"
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "rtGetInf.o" "rtGetInf.c"
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "rtGetNaN.o" "rtGetNaN.c"
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "rt_nonfinite.o" "rt_nonfinite.c"
C:/PROGRA~2/CODESO~1/SOURCE~1/bin/arm-none-linux-gnueabi-gcc -c -O0 -march=armv7-a -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -std=gnu99 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -DON_TARGET_WAIT_FOR_START=0 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -D__MW_TARGET_USE_HARDWARE_RESOURCES_H__ -DARM_PROJECT -DSTACK_SIZE=64 -DONESTEPFCN=1 -DEXT_MODE=1 -DTERMFCN=1 -DMAT_FILE=0 -DMULTI_INSTANCE_CODE=0 -DINTEGER_CODE=0 -DMT=1 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DON_TARGET_WAIT_FOR_START=0 -DRT -DUSE_RTMODEL -DERT -DTID01EQ=1 -DARM_PROJECT -DSTACK_SIZE=64 -DMODEL=Free_Flight -DNUMST=3 -DNCSTATES=4 -DHAVESTDIO -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/sf_runtime -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build/Free_Flight_ert_rtw -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/Build -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Models/Flight_Models -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:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/blocks -IC:/PROGRA~1/MATLAB/R2016b/simulink/include/messages -IC:/Users/kidus.guye/Downloads/SimulinkARDroneTarget-R2016_ab/AR_Drone_Target/include -IC:/PROGRA~1/MATLAB/R2016b/toolbox/target/codertarget/rtos/inc -o "slrtUDPReceive.o" "C:/PROGRA~1/MATLAB/R2016b/toolbox/slrt/blocks/UDP/slrtUDPReceive.c"
C:/PROGRA~1/MATLAB/R2016b/toolbox/slrt/blocks/UDP/slrtUDPReceive.c:13:25: fatal error: socketfuncs.h: No such file or directory
compilation terminated.
gmake: *** [slrtUDPReceive.o] Error 1
### Build procedure for model: 'Free_Flight' aborted due to an error.
Error(s) encountered while building "Free_Flight":
### Failed to generate all binary outputs.

[Vaibhav Arora]

Hi. Were you able to figure out the problem? I have the same error working with UDP block from the real-time library.