attempt to compare number with nil

[sx3]

Keep getting this error and I'm not sure how to get rid of it.

3/0/41 is DPT1
3/0/21 is a percentage value. I have tried using DPT9 and now using DPT5

3/0/21 is mostly at 0%, I've tried to manually set the GA to 0 to be sure it's not nil.

Code:

12

Resident script:9: attempt to compare number with nil stack traceback:

Code:

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local auxswitch = grp.getvalue('3/0/41') local auxstatus = grp.getvalue('3/0/21') if auxswitch == true then   grp.write('3/0/57', 0) elseif (auxswitch == false and auxstatus == 0) then   grp.write('3/0/57', 1) elseif (auxswitch == false and auxstatus >= 1 and auxstatus <= 33) then   grp.write('3/0/57', 2) elseif (auxswitch == false and auxstatus >= 34 and auxstatus <= 66) then   grp.write('3/0/57', 3) elseif (auxswitch == false and auxstatus >= 67 and auxstatus <= 100) then   grp.write('3/0/57', 4) end