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    Hi All,<br>
    <br>
    I have a 1D transient flow problem (1 dof) coupled with energy
    balance (1 dof), so the total dof per node is 2.<br>
    <br>
    The whole domain has 10 nodes in z direction. <br>
    <br>
    The program runs well with 1 processor but failed in 2 processors.
    The matrix is the same for 1 processor and 2 processor but the rhs
    are different. <br>
    <br>
    The following is used to set the rhs value.<br>
    <br>
    call VecGetArrayF90(x_vec_loc, vecpointer, ierr)<br>
    vecpointer = (calculate the rhs value here)<br>
    call VecRestoreArrayF90(x_vec_loc,vecpointer,ierr)<br>
    call DMLocalToGlobalBegin(da,x_vec_loc,INSERT_VALUES,
    x_vec_gbl,ierr)<br>
    call DMLocalToGlobalEnd(da,x_vec_loc,INSERT_VALUES, x_vec_gbl,ierr)<br>
    <br>
                                                                                                
    <b>Vecview  Correct </b>            <b><font color="#ff0000">Vecview 
        Wrong</font></b><br>
    dof     local node           Process [0]   
                                  <u>Process [0]   </u>                
     <i> <u>Process [0] </u></i><br>
    1            1              1.395982780116148E-021              
    1.39598e-021                 1.39598e-021<br>
    1            2              0.000000000000000E+000              
    0                                       0<br>
    1            3              0.000000000000000E+000              
    0                                       0<br>
    1            4              5.642372883946980E-037              
    5.64237e-037                 5.64237e-037<br>
    1            5              0.000000000000000E+000               
    0                                       0<br>
    <font color="#ff0000">1            6            
      -1.395982780116148E-021 </font>             <font color="#3366ff">
      -7.52316e-037 </font>               -1.39598e-021                      
    Line A<br>
    2            1              <font color="#33ff33">0.000000000000000E+000</font>              
    <font color="#3366ff">7.52316e-037</font>                 0<br>
    2            2              <font color="#33ff33">0.000000000000000E+000</font>               
    <font color="#3366ff">0  </font>                                    
    0<br>
    2            3             <font color="#33ff33">
      0.000000000000000E+000</font>               <font color="#3366ff">1.68459e-016 </font>                
    0<br>
    2            4              <font color="#33ff33">4.814824860968090E-035</font>               
    <font color="#3366ff">0.1296 </font>                           
    4.81482e-035<br>
    2            5              <font color="#33ff33">0.000000000000000E+000</font>                                          
                 <u><i>Process [1]</i></u>                            
    Line B<br>
    <font color="#ff0000">2            6            
      -1.371273884908092E-019</font>               <font
      color="#33ff33">0</font>                                       
    7.52316e-037                       Line C<br>
                                                                       
                             <font color="#33ff33">0</font>                         
                  0<br>
                                           Process [1]                  
                    <font color="#33ff33">0</font>                                      
    1.68459e-016<br>
    <font color="#ff0000">1            1             
      1.395982780116148E-021</font>               <font color="#33ff33">4.81482e-035</font>                
    0.1296                                     Line D<br>
    1            2             <font color="#3366ff">-7.523163845262640E-037</font>               
    <font color="#33ff33">0</font>                                     
    1.37127e-019                         Line E <br>
    1            3              <font color="#3366ff">7.523163845262640E-037</font>              
    -7.22224e-035                -7.22224e-035<br>
    1            4              <font color="#3366ff">0.000000000000000E+000</font>              
    7.22224e-035                 7.22224e-035<br>
    1            5              <font color="#3366ff">1.684590875336239E-016</font>               
    0                                       0<br>
    1            6              <font color="#3366ff">0.129600000000000</font>               
             128623                            128623<br>
    <font color="#ff0000">2            1             
      1.371273884908092E-019</font>              
    0                                       0                                               
    Line F<br>
    2            2             -7.222237291452134E-035            <br>
    2            3              7.222237291452134E-035            <br>
    2            4              0.000000000000000E+000            <br>
    2            5               128623.169844761                <br>
    2            6              0.000000000000000E+000    <br>
    <br>
    The red line (Line A, C, D and F) is the ghost values for 2
    subdomains, but when run with 2 processor, the program treates Line
    B, C, D, and E as ghost values.<br>
    <b>How can I handle this kind of local vector to global vector
      assembly?</b><br>
    <br>
    <b>In fact, the codes can work if the dof and local node is as
      follows.</b><br>
    dof     local node   <br>
    1            1       <br>
    2            1       <br>
    1            2       <br>
    2            2       <br>
    1            3       <br>
    2            3   <br>
    <br>
    Thanks and regards,<br>
    <br>
    Danyang<br>
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