Hello All. I suspect that this will be a clear noob question, but I haven't been able to figure it out using the usual methods, so I turn to you.
I've written a script to create input files for the quantum chemistry program NWCHEM. Generally you create an input file and then execute it by typing at the command line:
>> nwchem inputfile.nw
and hitting enter. I've written a script for a huge batch of jobs that will create the folders and sub-folders, write the correct input file to the sub-folders and then...
Well, then it has to execute the command "nwchem inputfile.nw", but "nwchem" isn't a standard command like "cd" or "mkdir" so it doesn't do anything. I've tried just echoing it to the line along with the inputfile.nw name, but then of course it doesn't actually RUN it. I'm guessing that this is a path issue, but I'm not sure who to a) find the folder that contains the nwchem command that I use when I just type it to the command line manually and b) how to specify that and run it from the .sh script.
Is there an easier way to do this? Something that just tells bash to treat a particular group of words as a command just like mkdir or cd?
Thanks for any help you can give me. The process of trying to get this done has almost taken longer than just doing it all by hand without a script.
Since you can type and run the command nwchem in shell, the path of it has already in the PATH environment variable.
That is, it can also run in scripts without specifying the absolute path.
So I think your problem is another case.
If you wanna find out the path of the command, type "which nwchem" in shell.
Yes, the path comes back /opt/local/share/nwchem/nwchem. Does this tell anyone anything about why I can't just use it in the .sh script the same way I do other (more standard) commands?
Thanks again for any help.
---------- Post updated at 09:11 PM ---------- Previous update was at 09:01 PM ----------
When you say "it doesn't do anything" do you mean that you are getting an error message like "not found or no such file/directory," or literally nothing is happening?
There is a possibility that the command is being executed, but it is quietly aborting. Assuming that nwchem is either a bash or Kshell script, consider adding the command
Code:
set -x
at the start of nwchem -- if nwchem is being invoked, this might give you a clue as to why it is not executing as you intended.
When you say "it doesn't do anything" do you mean that you are getting an error message like "not found or no such file/directory," or literally nothing is happening?
There is a possibility that the command is being executed, but it is quietly aborting. Assuming that nwchem is either a bash or Kshell script, consider adding the command
Code:
set -x
at the start of nwchem -- if nwchem is being invoked, this might give you a clue as to why it is not executing as you intended.
I create all of the directories and then write the input file in that directory under the name $basis_name$func_name$spin_name".nw", then try to run the program by outputting
>> nwchem $basis_name$func_name$spin_name.nw
in the same manner that I would in the shell by hand but it tells me that this is not a command.
I included the set -x as you said in the following way:
path=$PATH:/opt/local/share/nwchem/nwchem
set -x nwchem $basis_name$func_name$spin_name".nw"
and it output a list of the failed if/then statements (but not the ones that passed), one (but not all) of the directory changes, the exit command etc. It didn't tell me "command not found" as before.
I included the set -x as you said in the following way:
path=$PATH:/opt/local/share/nwchem/nwchem
set -x nwchem $basis_name$func_name$spin_name".nw"
and it output a list of the failed if/then statements (but not the ones that passed), one (but not all) of the directory changes, the exit command etc. It didn't tell me "command not found" as before.
I meant that set -x should be added inside of nwchem near the top (after the #!line if you are using that, otherwise as the first command). Sorry for the confusion.
You probably didn't get an error message this time round because the nwchem command after the 'set -x' was absorbed by the set command and there was no attempt to execute it.
Since you've said that you've been getting a 'not found' message, it does appear that it is a PATH issue, however from what you've posted it looks like you have your PATH setup to include the directory where nwchem exists.
Im not sure what is going on.
You can add path=$PATH:/opt/local/share/nwchem/nwchem in ~/.bash_profile
then you have two choice:
1 source ~/.bash_profile
so ,you can use your command now.
2 log out and then log in
then you can find it works
Last edited by skles; 08-03-2010 at 02:56 AM..
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