LC3 trap executed illegal vector number
<p>I'm trying to count the number of characters in LC3 simulator and keep getting "a trap was executed with an illegal vector number". 
These are the objects I execute</p>

<p>charcount.obj:</p>

<p>0011000000000000</p>

<p>0101010010100000
0010011000010000
1111000000100011
0110001011000000
0001100001111100
0000010000001000
1001001001111111
0001001001100001
0001001001000000
0000101000000001
0001010010100001
0001011011100001
0110001011000000
0000111111110110
0010000000000100
0001000000000010
1111000000100001
1111000000100101
1110001011111111
0000000000110000</p>

<p>and verse:
    .ORIG   x3100</p>

<pre><code>.STRINGZ "Simple Simon met a pieman,"
.STRINGZ "Going to the fair;"
.STRINGZ "Says Simple Simon to the pieman,"
.STRINGZ "Let me taste your ware."

.FILL   x04

.END
</code></pre>