Hello 
 I am using a cross compiled version of MPICH3, I was trying simple containing MPI_Send and MPI_Recv, it was working but suddenly I keep receiving this error messsage: can anyone point out what is wrong and how to fix it.

 $ mpiexec -v -n 4 /data/parallelCode                             
host: tab

==================================================================================================
mpiexec options:
----------------
  Base path: /system/xbin/
  Launcher: (null)
  Debug level: 1
  Enable X: -1

  Global environment:
  -------------------
    _=/system/xbin/mpiexec
    PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
    LOOP_MOUNTPOINT=/mnt/obb
    ANDROID_ROOT=/system
    SHELL=/system/bin/sh
    ANDROID_DATA=/data
    ANDROID_ASSETS=/system/app
    TERM=vt100
    ANDROID_PROPERTY_WORKSPACE=8,0
    ANDROID_BOOTLOGO=1
    HOSTNAME=hwt1701
    LD_LIBRARY_PATH=/vendor/lib:/system/lib
    BOOTCLASSPATH=/system/framework/core.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/hwframework.jar:/system/framework/hwcustframework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar:/system/framework/hwEmui.jar:/system/framework/hwServices.jar:/system/framework/hwAndroid.policy.jar:/system/framework/hwTelephony-common.jar:/system/framework/hwpadext.jar
    EMULATED_STORAGE_SOURCE=/mnt/shell/emulated
    ANDROID_SOCKET_adbd=10
    EMULATED_STORAGE_TARGET=/storage/emulated
    ANDROID_STORAGE=/storage
    MKSH=/system/bin/sh
    EXTERNAL_STORAGE=/storage/emulated/legacy
    USBHOST_STORAGE=/storage/usbdisk
    RANDOM=11338
    ASEC_MOUNTPOINT=/mnt/asec
    SECONDARY_STORAGE=/storage/sdcard1
    USER=shell
    LEGACY_STORAGE=/storage/emulated/legacy
    HOME=/data

  Hydra internal environment:
  ---------------------------
    GFORTRAN_UNBUFFERED_PRECONNECTED=y


    Proxy information:
    *********************
      [1] proxy: tab (1 cores)
      Exec list: /data/mmp100 (4 processes); 


==================================================================================================

[mpiexec@tab] Timeout set to -1 (-1 means infinite)
[mpiexec@tab] Got a control port string of tab:48661

Proxy launch args: /system/xbin/hydra_pmi_proxy --control-port tab:48661 --debug --rmk user --launcher ssh --demux poll --pgid 0 --retries 10 --usize -2 --proxy-id 

Arguments being passed to proxy 0:
--version 3.2 --iface-ip-env-name MPIR_CVAR_CH3_INTERFACE_HOSTNAME --hostname tab --global-core-map 0,1,1 --pmi-id-map 0,0 --global-process-count 4 --auto-cleanup 1 --pmi-kvsname kvs_10003_0 --pmi-process-mapping (vector,(0,1,1)) --ckpoint-num -1 --global-inherited-env 26 '_=/system/xbin/mpiexec' 'PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin' 'LOOP_MOUNTPOINT=/mnt/obb' 'ANDROID_ROOT=/system' 'SHELL=/system/bin/sh' 'ANDROID_DATA=/data' 'ANDROID_ASSETS=/system/app' 'TERM=vt100' 'ANDROID_PROPERTY_WORKSPACE=8,0' 'ANDROID_BOOTLOGO=1' 'HOSTNAME=hwt1701' 'LD_LIBRARY_PATH=/vendor/lib:/system/lib' 'BOOTCLASSPATH=/system/framework/core.jar:/system/framework/conscrypt.jar:/system/framework/okhttp.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/framework2.jar:/system/framework/hwframework.jar:/system/framework/hwcustframework.jar:/system/framework/telephony-common.jar:/system/framework/voip-common.jar:/system/framework/mms-common.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/apache-xml.jar:/system/framework/webviewchromium.jar:/system/framework/hwEmui.jar:/system/framework/hwServices.jar:/system/framework/hwAndroid.policy.jar:/system/framework/hwTelephony-common.jar:/system/framework/hwpadext.jar' 'EMULATED_STORAGE_SOURCE=/mnt/shell/emulated' 'ANDROID_SOCKET_adbd=10' 'EMULATED_STORAGE_TARGET=/storage/emulated' 'ANDROID_STORAGE=/storage' 'MKSH=/system/bin/sh' 'EXTERNAL_STORAGE=/storage/emulated/legacy' 'USBHOST_STORAGE=/storage/usbdisk' 'RANDOM=11338' 'ASEC_MOUNTPOINT=/mnt/asec' 'SECONDARY_STORAGE=/storage/sdcard1' 'USER=shell' 'LEGACY_STORAGE=/storage/emulated/legacy' 'HOME=/data' --global-user-env 0 --global-system-env 1 'GFORTRAN_UNBUFFERED_PRECONNECTED=y' --proxy-core-count 1 --exec --exec-appnum 0 --exec-proc-count 4 --exec-local-env 0 --exec-wdir / --exec-args 1 /data/mmp100 

[mpiexec@tab] Launch arguments: /system/xbin/hydra_pmi_proxy --control-port tab:48661 --debug --rmk user --launcher ssh --demux poll --pgid 0 --retries 10 --usize -2 --proxy-id 0 
[proxy:0:0@tab] got pmi command (from 0): init
pmi_version=1 pmi_subversion=1 
[proxy:0:0@tab] PMI response: cmd=response_to_init pmi_version=1 pmi_subversion=1 rc=0
[proxy:0:0@tab] got pmi command (from 0): get_maxes

[proxy:0:0@tab] PMI response: cmd=maxes kvsname_max=256 keylen_max=64 vallen_max=1024
[proxy:0:0@tab] got pmi command (from 6): init
pmi_version=1 pmi_subversion=1 
[proxy:0:0@tab] PMI response: cmd=response_to_init pmi_version=1 pmi_subversion=1 rc=0
[proxy:0:0@tab] got pmi command (from 6): get_maxes

[proxy:0:0@tab] PMI response: cmd=maxes kvsname_max=256 keylen_max=64 vallen_max=1024
[proxy:0:0@tab] got pmi command (from 9): init
pmi_version=1 pmi_subversion=1 
[proxy:0:0@tab] PMI response: cmd=response_to_init pmi_version=1 pmi_subversion=1 rc=0
[proxy:0:0@tab] got pmi command (from 15): init
pmi_version=1 pmi_subversion=1 
[proxy:0:0@tab] PMI response: cmd=response_to_init pmi_version=1 pmi_subversion=1 rc=0
[proxy:0:0@tab] got pmi command (from 0): get_appnum

[proxy:0:0@tab] PMI response: cmd=appnum appnum=0
[proxy:0:0@tab] got pmi command (from 9): get_maxes

[proxy:0:0@tab] PMI response: cmd=maxes kvsname_max=256 keylen_max=64 vallen_max=1024
[proxy:0:0@tab] got pmi command (from 0): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 15): get_maxes

[proxy:0:0@tab] PMI response: cmd=maxes kvsname_max=256 keylen_max=64 vallen_max=1024
[proxy:0:0@tab] got pmi command (from 0): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 9): get_appnum

[proxy:0:0@tab] PMI response: cmd=appnum appnum=0
[proxy:0:0@tab] got pmi command (from 0): get
kvsname=kvs_10003_0 key=PMI_process_mapping 
[proxy:0:0@tab] PMI response: cmd=get_result rc=0 msg=success value=(vector,(0,1,1))
[proxy:0:0@tab] got pmi command (from 15): get_appnum

[proxy:0:0@tab] PMI response: cmd=appnum appnum=0
[proxy:0:0@tab] got pmi command (from 6): get_appnum

[proxy:0:0@tab] PMI response: cmd=appnum appnum=0
[proxy:0:0@tab] got pmi command (from 9): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 15): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 6): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 6): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 9): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 0): put
kvsname=kvs_10003_0 key=P0-businesscard value=port#49751$description#tab$ifname#192.168.1.4$ 
[proxy:0:0@tab] cached command: P0-businesscard=port#49751$description#tab$ifname#192.168.1.4$
[proxy:0:0@tab] PMI response: cmd=put_result rc=0 msg=success
[proxy:0:0@tab] got pmi command (from 9): get
kvsname=kvs_10003_0 key=PMI_process_mapping 
[proxy:0:0@tab] PMI response: cmd=get_result rc=0 msg=success value=(vector,(0,1,1))
[proxy:0:0@tab] got pmi command (from 0): barrier_in

[proxy:0:0@tab] got pmi command (from 6): get
kvsname=kvs_10003_0 key=PMI_process_mapping 
[proxy:0:0@tab] PMI response: cmd=get_result rc=0 msg=success value=(vector,(0,1,1))
[proxy:0:0@tab] got pmi command (from 15): get_my_kvsname

[proxy:0:0@tab] PMI response: cmd=my_kvsname kvsname=kvs_10003_0
[proxy:0:0@tab] got pmi command (from 9): put
kvsname=kvs_10003_0 key=P2-businesscard value=port#60729$description#tab$ifname#192.168.1.4$ 
[proxy:0:0@tab] cached command: P2-businesscard=port#60729$description#tab$ifname#192.168.1.4$
[proxy:0:0@tab] PMI response: cmd=put_result rc=0 msg=success
[proxy:0:0@tab] got pmi command (from 15): get
kvsname=kvs_10003_0 key=PMI_process_mapping 
[proxy:0:0@tab] PMI response: cmd=get_result rc=0 msg=success value=(vector,(0,1,1))
[proxy:0:0@tab] got pmi command (from 9): barrier_in

[proxy:0:0@tab] got pmi command (from 6): put
kvsname=kvs_10003_0 key=P1-businesscard value=port#44344$description#tab$ifname#192.168.1.4$ 
[proxy:0:0@tab] cached command: P1-businesscard=port#44344$description#tab$ifname#192.168.1.4$
[proxy:0:0@tab] PMI response: cmd=put_result rc=0 msg=success
[proxy:0:0@tab] got pmi command (from 15): put
kvsname=kvs_10003_0 key=P3-businesscard value=port#51326$description#tab$ifname#192.168.1.4$ 
[proxy:0:0@tab] cached command: P3-businesscard=port#51326$description#tab$ifname#192.168.1.4$
[proxy:0:0@tab] PMI response: cmd=put_result rc=0 msg=success
[proxy:0:0@tab] got pmi command (from 6): barrier_in

[proxy:0:0@tab] got pmi command (from 15): barrier_in

[proxy:0:0@tab] flushing 4 put command(s) out
[mpiexec@tab] [pgid: 0] got PMI command: cmd=put P0-businesscard=port#49751$description#tab$ifname#192.168.1.4$ P2-businesscard=port#60729$description#tab$ifname#192.168.1.4$ P1-businesscard=port#44344$description#tab$ifname#192.168.1.4$ P3-businesscard=port#51326$description#tab$ifname#192.168.1.4$
[proxy:0:0@tab] forwarding command (cmd=put P0-businesscard=port#49751$description#tab$ifname#192.168.1.4$ P2-businesscard=port#60729$description#tab$ifname#192.168.1.4$ P1-businesscard=port#44344$description#tab$ifname#192.168.1.4$ P3-businesscard=port#51326$description#tab$ifname#192.168.1.4$) upstream
[proxy:0:0@tab] forwarding command (cmd=barrier_in) upstream
[mpiexec@tab] [pgid: 0] got PMI command: cmd=barrier_in
[mpiexec@tab] PMI response to fd 6 pid 15: cmd=keyval_cache P0-businesscard=port#49751$description#tab$ifname#192.168.1.4$ P2-businesscard=port#60729$description#tab$ifname#192.168.1.4$ P1-businesscard=port#44344$description#tab$ifname#192.168.1.4$ P3-businesscard=port#51326$description#tab$ifname#192.168.1.4$ 
[mpiexec@tab] PMI response to fd 6 pid 15: cmd=barrier_out
[proxy:0:0@tab] PMI response: cmd=barrier_out
[proxy:0:0@tab] PMI response: cmd=barrier_out
[proxy:0:0@tab] PMI response: cmd=barrier_out
[proxy:0:0@tab] PMI response: cmd=barrier_out
[proxy:0:0@tab] got pmi command (from 0): get
kvsname=kvs_10003_0 key=P1-businesscard 
[proxy:0:0@tab] PMI response: cmd=get_result rc=0 msg=success value=port#44344$description#tab$ifname#192.168.1.4$
Fatal error in MPI_Send: Unknown error class, error stack:
MPI_Send(174)...............................: MPI_Send(buf=0x15c56c, count=1, MPI_INT, dest=1, tag=1, MPI_COMM_WORLD) failed
MPIDI_CH3i_Progress_wait(242)...............: an error occurred while handling an event returned by MPIDU_Sock_Wait()
MPIDI_CH3I_Progress_handle_sock_event(697)..: 
MPIDI_CH3_Sockconn_handle_connect_event(597): [ch3:sock] failed to connnect to remote process
MPIDU_Socki_handle_connect(808).............: connection failure (set=0,sock=1,errno=113:No route to host)
[proxy:0:0@tab] got pmi command (from 0): abort
exitcode=69331543 
[proxy:0:0@tab] we don't understand this command abort; forwarding upstream
[mpiexec@tab] [pgid: 0] got PMI command: cmd=abort exitcode=69331543