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If the script sub.sh is not in a directory included in the PATH environment variable, you have to specify the absolute or relative path on the command line. If you want to launch an executable placed in the current working directory you can simply do
Thanks for the welecome message and your response.
I am in the directory where the file is. However, even "./sub.sh" is generating the same : Command not found message.
I have two similar packages that use same codes and scripts, with some deferences in input and output files and calculations. Script in one package is running perfectly but script in this second package is creating Command not found. Both scripts from both packages are the same and are using the same environment.
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