title: Why is QtSPIM telling me "Label is defined for the second time"?
body: <p>I am brand new to learning MIPS assembly code, and we got our first coding assignment. I am getting an error when I run my program (which is supposed to be a tester for another function we have to write) saying</p>
  
  <p>"spim: (parser) Label is defined for the second time on line 13 of file /home/jlr247/215_A2_work/jlr247-a2-A.s
    main:
        ^"</p>
  
  <p>The code I have is:</p>
  
  <pre><code>.data
  .align 4
  _arrA: .space 400
  _arrB: .space 400
  
  .text
  
  main:
  la $t0, _arrA       #load base address of array A
  la $t1, _arrB       #load base address of array B
  
  addi $t2, $zero, 0  #$t2 = i = 0
  
  FILL_LOOP:  #initializes all A[] values to 5, all B[] values to 10
  slti $t3, $t2, 100          #check i&lt;100
  beq $t3, $zero, LOOP_DONE   #end loop when i=100
  sll $t3, $t3, 2             #multiply shift by 4
  add $t4, $t3, $t0           #$t4 = address of A[i]
  add $t5, $t3, $t1           #$t5 = address of B[i]
  addi $t6, $zero, 5
  sw $t6, 0($t4)              #A[i] = 5
  addi $t6, $zero, 10
  sw $t6, 0($t5)              #B[i] = 10
  j FILL_LOOP
  
  LOOP_DONE:
  
  li $v0, 1   #get ready to print test values for A[0], A[396]
  lw $a1, 0($t1)
  lw $a2, 396($t1)
  syscall     #should print 55
  
  li $v0, 1   #get ready to print test values for B[0], B[396]
  lw $a1, 0($t2)
  lw $a2, 396($t2)
  syscall     #should print 1010
  
  EXIT:
  </code></pre>
  
  <p>Any ideas? I'm sure it's something basic and obvious that I just haven't managed to learn yet. Thank you!</p>