Error reading data area

I have a data area, ##TRIGCTL. It is a flag to allow me to disable a trigger program without requiring exclusive access to the PF in question. I created the data area like so:

CRTDTAARA DTAARA(<lib>/##TRIGCTL) TYPE(*LGL) LEN(1) VALUE('1') TEXT('1 to run DSR070T00 trigger, 0 to disable')

My corresponding RPG variable is defined with this line:

D triggerControl...
D S 1A dtaara(##trigCtl)


The first lines of my RPG trigger program are:

in triggerControl;
if (triggerControl <> '1');
return;
endif;

FWIW, I initially tried defining triggerControl as a named indicator, but it evaluated to false even though the value was '1' in debug.

When the code above runs, I get the error message below. It seems contradictory to me. I'll work around this by defining the data area as character instead, but can anyone shed light on this problem for future reference?

Message ID . . . . . . : RNX0411 Severity . . . . . . . : 50
Message type . . . . . : Escape
Date sent . . . . . . : 04/10/08 Time sent . . . . . . : 09:34:33


Message . . . . : Data area <lib>/##TRIGCTL type or length does not match
program data area *LIBL/##TRIGCTL.
Cause . . . . . : Data area *LIBL/##TRIGCTL was defined in the RPG procedure
to be of type *CHAR and length 1. The actual data area <lib>/##TRIGCTL is of
type *LGL and length 1. If a *LGL data area is expected, a data area of type
*CHAR and length 1 is also allowed.
Recovery . . . : Correct the type or length of the data area, or change the
library list so the correct data area will be found.