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    Sorry to spam. I could solve the issue. <br>
    W  ,W  ,W  ,w             V bc's  ! west,east,south,north,bottom,top<br>
    should be changed to<br>
    W  ,W  ,W  ,v             V bc's  ! west,east,south,north,bottom,top<br>
    <br>
    So just a typo in boundary conditions. <br>
    <br>
    <div class="moz-cite-prefix">On 1/18/2016 8:07 PM,
      <a class="moz-txt-link-abbreviated" href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a> wrote:<br>
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    <blockquote
cite="mid:mailman.13793.1453165668.24727.nek5000-users@lists.mcs.anl.gov"
      type="cite"> <defanged_meta http-equiv="content-type"
        content="text/html; "> Hi Neks,<br>
        <br>
        I'm trying to solve a simple 2D cavity problem with Nek and I've
        got the following error:<br>
        <br>
        EXIT: E INVALID BC FOUND in genfast         64<br>
        <br>
        <ul>
          <li>For your info here is the genbox script I used for the
            mesh:</li>
        </ul>
        <br>
        test5.rea<br>
        2                         spatial dimension<br>
        1                         number of fields<br>
        #<br>
#=======================================================================<br>
        #<br>
        box_1                     1st character .ne. "c" or "C"<br>
        -8  -8  1                 nelx,nely,nelz <br>
        0   1  1            x_0  x_Nelx  ratio<br>
        0   1  1<br>
        W  ,W  ,W  ,w             V bc's  !
        west,east,south,north,bottom,top<br>
        <br>
        <ul>
          <li>Also, this is the userbc part in user file:</li>
        </ul>
c-----------------------------------------------------------------------<br>
              subroutine userbc (ix,iy,iz,iside,ieg)<br>
              include 'SIZE'<br>
              include 'TSTEP'<br>
              include 'INPUT'<br>
              include 'NEKUSE'<br>
              <br>
              ux=1.<br>
              uy=0. <br>
                 <br>
              return<br>
              end<br>
        <br>
        This should be a straightforward problem but am not sure which
        part I'm getting wrong. Any advice is appreciated. Hopefully, I
        can make a sample tutorial for this well-known problem and share
        with new comers.<br>
        <br>
        Thanks,<br>
        Saleh<br>
        <br>
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        <br>
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</pre>
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