Hi again Joao,

Misunderstood your question a bit. To determine the if it exists in the first column (rather than the first instance), try this:

lnpos = ASCAN(my_array, 3)
lldone = (ASUBSCRIPT(my_array, lnpos, 2) = 1)
DO WHILE NOT lldone AND lnpos # 0
  lnpos = ASCAN(my_array, 3, lnpos + 1)
  lldone = (ASUBSCRIPT(my_array, lnpos, 2) = 1)
ENDDO
IF lldone
  lnrow = ASUBSCRIPT(my_array, lnpos, 1)
ENDIF

hth,