Dear Sir ;<br><br>What does it mean when I try to use PWSCF in parallel using mpiexec ... it gives the following massege : <br><br><br><br>-----------------------------------------------------------------------------<br>*** Oops -- I cannot open the LAM help file. 
<br>*** I tried looking for it in the following places: <br>***<br>***   $HOME/lam-helpfile<br>***   $HOME/lam-7.0.6-helpfile<br>***   $HOME/etc/lam-helpfile<br>***   $HOME/etc/lam-7.0.6-helpfile<br>***   $LAMHELPDIR/lam-helpfile 
<br>***   $LAMHELPDIR/lam-7.0.6-helpfile<br>***   $LAMHOME/etc/lam-helpfile <br>***   $LAMHOME/etc/lam-7.0.6-helpfile<br>***   $SYSCONFDIR/lam-helpfile<br>***   $SYSCONFDIR/lam-7.0.6-helpfile<br>***<br>*** You were supposed to get help on the program "MPI" 
<br>*** about the topic "no-lamd" <br>***<br>*** Sorry!<br>-----------------------------------------------------------------------------<br>----------------------------------------------------------------------------- 
<br>*** Oops -- I cannot open the LAM help file. <br>*** I tried looking for it in the following places:<br>***<br>***   $HOME/lam-helpfile<br>***   $HOME/lam-7.0.6-helpfile<br>***   $HOME/etc/lam-helpfile<br>***   $HOME/etc/lam- 
7.0.6-helpfile<br>***   $LAMHELPDIR/lam-helpfile <br>***   $LAMHELPDIR/lam-7.0.6-helpfile<br>***   $LAMHOME/etc/lam-helpfile<br>***   $LAMHOME/etc/lam-7.0.6-helpfile<br>***   $SYSCONFDIR/lam-helpfile<br>***   $SYSCONFDIR/lam- 
7.0.6-helpfile<br>***<br>*** You were supposed to get help on the program "MPI" <br>*** about the topic "no-lamd"<br>***<br>*** Sorry!<br>----------------------------------------------------------------------------- 
<br>----------------------------------------------------------------------------- <br><br>It seems that there is no lamd running on the host Main-server.<br><br>This indicates that the LAM/MPI runtime environment is not operating. 
<br>The LAM/MPI runtime environment is necessary for MPI programs to run<br>(the MPI program tired to invoke the "MPI_Init" function).<span></span> <br><br>Please run the "lamboot" command the start the LAM/MPI runtime 
<br>environment.  See the LAM/MPI documentation for how to invoke<br>"lamboot" across multiple machines. <br>-----------------------------------------------------------------------------