Ok, back to basics - this is the simplest setup I can imagine.<br><br>I am trying to run pvserver on a single extra computer (so a total of mine + 1 = 2 machines) with the same architecture, same OS, same OpenMPI, same Paraview. I have been talking with the OpenMPI people and running &quot;hello world&quot; tests that are showing that everything is setup correctly and talking to each other with no problems. Both firewalls are off. Password-less ssh works both ways. pvserver is on both machine&#39;s PATH. I have compiled Paraview with PARAVIEW_USE_MPI set to ON in both cases. I have explicitly added the path to the openmpi libraries to LD_LIBRARY_PATH on both machines - that is, put the following in .bashrc on both machines:<br>
<br>export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib<br><br>I am starting the server with a paraview command like this:<br><br>
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<p style="margin: 0px; text-indent: 0px;">mpirun -machinefile /home/doriad/Desktop/paraview_benchmarks/local_1+cloud_1.txt pvserver</p><br>where local_1+cloud_1.txt is:<br><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);">10.1.2.126<br>
10.1.2.122<br><br></span>my machine is 126. I tell Paraview to connect to 10.1.2.126 on 11111.<br><br>When I try to connect, I get the following in the paraview Output Messages. Any thoughts on what I have missed?<br><br>
<span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);">Listen on port: 11111</span>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);"> </span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);">Waiting for client...</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);"> </span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">ERROR: In /home/doriad/src/ParaView3/Servers/Common/vtkServerConnection.cxx, line 67</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">vtkServerConnection (0x8d23600): Server Connection Closed!</span></p>


<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">ERROR: In /home/doriad/src/ParaView3/Servers/ServerManager/vtkSMStringArrayHelper.cxx, line 84</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">vtkSMStringArrayHelper (0x8915030): Error getting array settings from server.</span></p>


<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">ERROR: In /home/doriad/src/ParaView3/Servers/ServerManager/vtkSMStringArrayHelper.cxx, line 84</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">vtkSMStringArrayHelper (0x8bb26e0): Error getting array settings from server.</span></p>


<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">ERROR: In /home/doriad/src/ParaView3/Servers/ServerManager/vtkSMIntArrayInformationHelper.cxx, line 71</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">vtkSMIntArrayInformationHelper (0x8bb9370): Error getting array from server.</span></p>


<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">ERROR: In /home/doriad/src/ParaView3/Servers/ServerManager/vtkSMStringArrayHelper.cxx, line 84</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">vtkSMStringArrayHelper (0x8922580): Error getting array settings from server.</span></p>


<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);">Client connected.</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(0, 128, 0);"> </span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] *** Process received signal ***</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] Signal: Segmentation fault (11)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] Signal code: Address not mapped (1)</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] Failing at address: 0x134</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 0] [0x63540c]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 1] /usr/local/lib/openmpi/mca_btl_tcp.so [0xb2a3e0f6]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 2] /usr/local/lib/libopen-pal.so.0 [0x30a0cb0]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 3] /usr/local/lib/libopen-pal.so.0(opal_event_loop+0x27) [0x30a0f17]</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 4] /usr/local/lib/libopen-pal.so.0(opal_progress+0xda) [0x3094bfa]</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 5] /usr/local/lib/openmpi/mca_pml_ob1.so [0x8742695]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 6] /usr/local/lib/libmpi.so.0(MPI_Ssend+0x130) [0x1e9e7c0]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[ 7]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_Z26vtkMPICommunicatorSendDataIcEiPKT_iiiiP15ompi_datatype_tPP19ompi_communicator_tii+0xff)
[0x4eed1f1]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[ 8]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN18vtkMPICommunicator13SendVoidArrayEPKviiii+0x34c)
[0x4ee97d4]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [ 9] /home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN15vtkCommunicator4SendEPKhiii+0x3c) [0x7486da]</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[10]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN25vtkMultiProcessController18TriggerRMIInternalEiPviib+0xe1)
[0x4e1871b]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[11]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN16vtkMPIController18TriggerRMIInternalEiPviib+0xa1)
[0x4eedba1]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[12]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN25vtkMultiProcessController23TriggerRMIOnAllChildrenEPvii+0x77)
[0x4e18565]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[13]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN20vtkMPISelfConnection30SendStreamToServerNodeInternalEiR21vtkClientServerStream+0x1d1)
[0x74b0df]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[14]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN20vtkMPISelfConnection22SendStreamToDataServerER21vtkClientServerStream+0x29)
[0x74af07]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[15]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN26vtkProcessModuleConnection10SendStreamEjR21vtkClientServerStream+0x57)
[0x74dd97]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[16]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN33vtkProcessModuleConnectionManager10SendStreamEijR21vtkClientServerStreami+0x4d)
[0x751637]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[17]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN16vtkProcessModule10SendStreamEijR21vtkClientServerStreami+0x65)
[0x75b0af]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [18] /home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_Z22vtkClientConnectionRMIPvS_ii+0x6f) [0x74622c]</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[19]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN25vtkMultiProcessController10ProcessRMIEiPvii+0x247)
[0x4e192b5]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[20]
/home/doriad/bin/ParaView3/bin/libvtkParallel.so.pv3.7(_ZN25vtkMultiProcessController11ProcessRMIsEii+0x66d)
[0x4e19013]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[21]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN19vtkRemoteConnection20ProcessCommunicationEv+0x3b)
[0x7b025f]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[22]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN33vtkProcessModuleConnectionManager18MonitorConnectionsEm+0x5bd)
[0x75102f]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[23]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN16vtkProcessModule11StartServerEm+0x15f)
[0x759abf]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646]
[24]
/home/doriad/bin/ParaView3/bin/libvtkPVServerCommon.so(_ZN16vtkProcessModule5StartEiPPc+0x34f)
[0x75955b]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [25] /home/doriad/bin/ParaView3/bin/libvtkPVFilters.so(_ZN9vtkPVMain3RunEP12vtkPVOptions+0x1d2) [0x3f5b5c]</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [26] pvserver(main+0xb3) [0x8049287]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [27] /lib/libc.so.6(__libc_start_main+0xe6) [0x81b8a66]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] [28] pvserver [0x8049141]</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">[daviddoria:20646] *** End of error message ***</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">--------------------------------------------------------------------------</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">mpirun noticed that process rank 0 with PID 20646 on node daviddoria exited on signal 11 (Segmentation fault).</span></p>

<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);">--------------------------------------------------------------------------</span></p>
<p style="margin: 0px; text-indent: 0px;"><span style="font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);"> </span></p>
<p style="margin: 0px; text-indent: 0px; font-family: &#39;Courier&#39;; font-size: 10pt; color: rgb(128, 0, 0);"></p><br clear="all">Thanks,<br><br>David