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Can you post the output of below command:
echo "$line" | od -c

I recommend corona's suggestion. But here is what you should modify in order to get your code work:
read a <<< $(awk -v r="$moduleID" 'BEGIN{print index(r,"#")}')

Running awk to process a single line is overkill. Running awk to process a single word is decadence. :)

BASH has its own string operations that work much faster than loading, running, and...