Passing a second variable to gawk in this Bash shell script is failing

I want to pass two variables to my AWK script from my shell script.

#!/bin/bash

HeaderSize=$(grep -n "# end header data" input.list | tr ":" "\n" | head -n 1)
RecordSize=$(grep -n "# Number of unique" input.list | tr ":" "\n" | tail -n 1 | sed 's/,//g')

echo $HeaderSize
echo $RecordSize

head -n $HeaderSize input.list > temp.list

./parse.awk -v headersize=$HeaderSize -v recordsize=$RecordSize < input.list >> temp.list

File parse.awk looks something like this:

#!/bin/gawk -f

BEGIN {
    curline=1;
    excludeline=0;
    newrecordsize=0;
}
{
    if (curline < $headersize) {
        curline++;
    } else {
        if (($2 !~ /test1/) && ($2 !~ /test2/) && ($2 !~ /test3/)) {
            print $0;
        } else {
            excludeline++;
        }
    }
}
END {
    print "#", excludeline, "lines excluded";
    newrecordsize = recordsize - excludeline;
    printf "# Number of unique items after exclusions: %'d\n", newrecordsize;
}

So I just wanted to copy the header directly over, then do some exclude some of the data.

When I run the Bash file I get an error on the gawk execution:

38
94108
gawk: ./parse.awk:6: fatal: cannot open file `94108' for reading (No such file or directory)

94108 is the value for RecordSize or the second variable I'm trying to pass.

How can I fix this error?

Edit: The answer is found below has to do with double quotes on the variables, which apparently I should be doing everywhere. Here are my current script which works fine.

#!/bin/bash

HeaderSize=$(grep -n "# end header data" input.list | tr ":" "\n" | head -n 1)
RecordSize=$(grep -n "# Number of unique" input.list | tr ":" "\n" | tail -n 1 | sed 's/,//g')

echo "$HeaderSize"
echo "$RecordSize"

head -n "$HeaderSize" input.list > temp.list

./parse.awk -v "headersize=$HeaderSize" -v "recordsize=$RecordSize" < input.list >> temp.list

I also cleaned up the awk script

#!/bin/gawk -f

BEGIN {
    excludeline=0;
    newrecordsize=0;
}

NR > headersize {
    if (($2 !~ /test1/) && ($2 !~ /test2/) && ($2 !~ /test3/)) {
        print $0;
    } else {
        excludeline++;
    }
}
END {
    print "#", excludeline, "lines excluded";
    newrecordsize = recordsize - excludeline;
    printf "# Number of unique domains after exclusions: %'d\n", newrecordsize; 
}