I am running DMC calculations by using dmc_stats runtype and have to do more moves.
So do more moves. You can do this using the auto-continue feature of runqmc in the way I suggested.
Yes. I am using c_pp.data and c_pp.awfn files which are always in the directory and readable.
First off, CASINO doesn't read c_pp.awfn files unless you're doing a single atom calculation with the orbitals tabulated on a grid and this is the main wave function file (in which case it should be renamed awfn.data).
As for the c_pp.data, the error message was clear enough: it means that there was an error opening the file. It doesn't mean that the file doesn't exist - since then CASINO would just treat the atom as all-electron. It doesn't mean that the format of the file is wrong, as it hasn't started to formally read it yet. Any pseudopotential files are read once only at the start of the run..
I don't understand what you mean when you say "Then, I start running them with copying c_pp.data and pasting it into the folder including input files." First of all, what's all this 'copying and pasting'? You're not using Windows, are you? At what point are you doing this copying and pasting?
Could you just tell me:
(1) what files are present in the directory before you type the runqmc command?
(2) At this point are you able to e.g. 'vi c_pp.data' and see a correctly formatted pseudopotential file like the one in the manual or in the online pseudopotential library?
(3) Are any of the files symbolic links, and if so where do they point to? (see below)
(4) You then type runqmc, and then what? Sometimes it starts and runs out of time? And sometimes it stops immediately with 'Error opening c_pp.data'? If so, what's the difference in setup between the two cases?
Weird file errors are almost always due to (1) users filling up a disk or running over their disk quota (are you? Try 'quota' and 'df'), or (2) Windows-specific newline characters appearing in files which for some reason are in DOS format. However, these days runqmc should automatically convert them back to the correct Unix format using the built-in dos2unix utility. Note such files can also have their origin on Apple machines e.g. there is a bug in the 'Apple Mail' program, which results in the newlines of plain text files sent as attachments being changed to DOS format by some Unix email clients (such as pine/alpine). So just to check: what operating system are you using? Where did you get your pseudopotential files?
I do not know. How can I check it?
To check if a file is a symbolic link, type 'ls -CF' - links will have an @ character after them e.g. c_pp.data@ . If it is, then type 'ls -l' to see where the link points to e.g. lrwxrwxrwx 1 mdt26 tcm 25 Jun 27 2013 c_pp.data -> /my/arse/c_pp.data