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I am trying to map a hostname to a queue manager name using the following array. I get an error with bad array script. What am I doing wrong here

declare -A managers 

while read -r mgr host; do
managers[$mgr]=$host 
done < file.txt

QMGR=$(cat qmgr.txt) 
host=${managers[$QMGR]}

I get the following error:

Bad array sub script at line 3
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  • If the done is on the same line as the managers assignment, the syntax is fairly broken. If not: What is the value of mgr at this point? Easiest way to find out might be set -x. By the way, I get "bad array subscript" when the subscript is empty. Is this your error? Commented Jul 29, 2021 at 5:00
  • Thats was formatting error(done line). Ues bad array subscript is my error Commented Jul 29, 2021 at 5:09
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    Most likely, the subscript is empty. Commented Jul 29, 2021 at 5:49
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    Show us an example input which reproduces this error. Commented Jul 29, 2021 at 5:56
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    (a) See shellcheck.net. (b) Quote all variable expansions. (c) Show us the input files. (d) Print every variable immediately it changes, preferably like: declare -p managers. (e) Do you have a shebang? (f) The only subscript operation is not on line 3, so you are not showing us the script you are running. Commented Jul 29, 2021 at 8:26

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