Please copy and paste text rather than posting screenshots. (Especially screenshots with light purple text on a slightly darker purple background!)

You did not run the command:

Code:

printf 'filename: %s\n' "$filename"

(with the double quotes around $filename) as I requested. If you had run that command as I requested, you would have seen that the variable filename contains the filename matching pattern you assigned to that variable (i.e., INPUT_GIANT_*csv); not the filename matching that pattern INPUT_GIANT_JUN2016.csv.

You also did not show us your complete script. If you had shown us the original script that produced the diagnostic you showed us in post #1 in this thread:

Code:

debug_GST.sh: line 8: INPUT_GIANT_*csv: No such file or directory

and line 8 in that script did expand $filename, I would bet that it did so within double quotes like the printf command I asked you to run above using "$filename".

And, although I did have an off-by-one error since I didn't know what your filenames looked like. Your script will run faster if you change the lines:

Code:

GIANT_MONYYYY=$(echo $filename | awk '{print substr($0,length($0)-10,7)}')
# cp INPUT_GIANT_*.csv INPUT_GIANT.csv
tr '\r' '\n' < INPUT_GIANT_*.csv | grep -v '^$' > INPUT_GIANT.csv

in the script you showed us in post #1 to:

Code:

GIANT_MONYYYY=${filename%????}
GIANT_MONYYYY=${GIANT_MONYYYY#???????}
# cp INPUT_GIANT_*.csv INPUT_GIANT.csv
tr -d '\r' < $filename > INPUT_GIANT.csv

since it eliminates a subshell invocation and the invocation of two unneeded external utilities (awk and grep).