[Pw_forum] about -npool

[sun jason]

Dear all,

I got a strange thing. I compiled espresso-3.0, I want to use k-point 
parallel to rise the speed. all the examples can run with or without 
"-npool" in the command line.

when I deal with my own system. pw.x can run with "-npool ",  but ph.x can 
only run without " -npool ", when I use it, the program will stop and 
display 
-----------------------
MPI Abort by user Aborting program !
Aborting program!
-----------------------
the CRASH message said 
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

 
     task #         7
     from davcio : error #        23
     i/o error in davcio
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


--------------
what's wrong? 

any suggestion would be very appreciated.

best,
============================================== 
Jian SUN 
Physics Dept. of Nanjing University 
National Lab. of Solid State Microstructures 
22 Hankou Road, Gulou District 
Nanjing, Jiangsu Province 
210093 
China 
==============================================