[RBASE-L] - SELECT not allowed within IF statement

[Bruce A. Chitiea]

All:

What I need to do is test a variable against a list of values within an IF
statement.

This works:

      IF vHumpty NOT IN +
      ('JAN','FEB','MAR', ... 'DEC') THEN

I'd rather avoid hard-coding the values; preferring to pull values
dynamically.

All the following attempts fail, producing this error message:

      '-ERROR- Sub-SELECTs are not supported by this command. (2310)'

This fails:

      IF vHumpty NOT IN +
      (SELECT CalMonthAbbr FROM zMonth) THEN

As does this:

      SET VAR vDumpty TEXT =  +
      '(SELECT CalmonthAbbr FROM zMonth)'

      IF vHumpty NOT IN + 
      &vDumpty THEN

As does this:

      SET VAR vGrimmBros TEXT = +
      '(SELECT CalMonthAbbr FROM zMonth)

      SET VAR vDumpty TEXT = .vGrimmBros

      IF vHumpty NOT IN +
      &vDumpty THEN

It must be real simple. I'm just not seeing it.

TIA

Bruce