Need some help with syntax

Hi!

Can anyone tell me what's wrong with this syntax?

IF ISNUMBER(as_tolerance) THEN
	ls_compare = "NUMBER"
	ldec_tolerance = dec(as_tolerance)
ELSEIF right(trim(as_tolerance),1) = "%" THEN
	IF ISNUMBER( left(trim(as_tolerance),len(as_tolerance)-1))
		ls_compare = "PERCENT"
		ldec_tolerance = left(trim(as_tolerance),len(as_tolerance)-1)
	END IF
//ELSEIF lower(right(trim(as_tolerance), 5) ) = "units" then
//	IF ISNUMBER(left(trim(as_tolerance), len(as_tolerance) - 5)) THEN
//		ls_compare = "UNITS"
//		ldec_tolerance = dec(left(as_tolerance, len(as_tolerance) - 5))
ELSE
	return "U"
END IF

I keep getting a syntax error when trying to save at the line that says IF IsNumber... right after the first ElseIf statement. Trying to determine if what I'm comparing is hard numbers, percentages, or (later) units.

Probably a rookie mistake, but I'm not seeing it. Using PB2022 R3.

TIA,
~~~Tracy

Resolved Need some help with syntax