[Pw_forum] read_file: problem reading .save files

[Gabriele Sclauzero]

Dear users,

     while using the cvs version of pwscf (althought not the latest) I 
encountered the following problem. When I run a job with pw.x saving 
files (like .wfc*, .igk*, .save ...) locally in the scratch dirs of each 
node (not accesible from the other nodes), each node will have his .wfc 
and .igk, but only one node will write and then be able to access the 
.save directory tree.
     If I subsequently run a post processing program (like pp.x, 
projwfc.x , pwcond.x ...) that uses the read_file subroutine to access 
these data files in the .save directory, ALL the processors try to read 
some file in that directory (but obviously not all of them will be able 
to see that file, if I use more than one node). The error given is:

     from read_file  : error #         1
     problem reading file /local_scratch/sclauzer/tmp/prefix.save

I also followed the suggestion (from one of pwscf developers) to print 
some debug info.
 From some processors I get:

  lexist =  T
  /local_scratch/sclauzer/tmp/prefix.save/data-file.xml

 From the others:

  lexist =  F
  /local_scratch/sclauzer/tmp/prefix.save/data-file.xml

Where the second string is the file every processor is trying to access, 
I suppose.

Gabriele