erroneous and not needed. If you want to use awk in the "shebang", the script needs to be pure awk.

not used in script and thus obviously not needed

WHAT is File? And, WHY two redirections?


Clean and consistent indenting sometimes helps track down errors. Try running this from the command line (i.e. DON'T put it into a script file). It should show you the target files for the redirections without actually creating and populating those files:

Code:

awk -F, '
BEGIN   {months ["JAN"]="AP01"; months ["FEB"]="AP02"; months ["MAR"]="AP03";
         months ["APR"]="AP04"; months ["MAY"]="AP05"; months ["JUN"]="AP06";
         months ["JUL"]="AP07"; months ["AUG"]="AP08"; months ["SEP"]="AP09";
         months ["OCT"]="AP10"; months ["NOV"]="AP11"; months ["DEC"]="AP12";
        }
        {print "a_" FILENAME "_ACTUAL_"months[substr($3,0,3)]"20" substr($3,5,2)"_RR.txt"
        }
' *.txt