error using _variable in open cursor statement

Hi,

I try this example taken from
http://www.aubit.com/aubit4gldoc/manual/html/aubit_4gl_enhancements.html#PAUSE%20Screen%20Handling

Passing IDs to functions
module1.4gl:

DECLARE c1 CURSOR FOR SELECT * FROM systables
CALL open_cursor("module1:c1")

anymod.4gl:

FUNCTION open_cursor(p_cursor)
    DEFINE p_cursor CHAR(20)

    OPEN CURSOR _variable(p_cursor)

    IF SQLCA.SQLCODE!=0 THEN
        ERROR "There was some error opening the cursor!"
    END IF

END FUNCTION

but compiling anymod.4gl, I got error like this

DATABASE testdb
FUNCTION open_cursor(p_cursor)
    DEFINE p_cursor CHAR(20)

    OPEN CURSOR _variable(p_cursor)
|________________________________^
| Error at line 5, character 34
| syntax error, unexpected '_variable'  (_variable)

    IF SQLCA.SQLCODE!=0 THEN
        ERROR "There was some error opening the cursor!"
    END IF

END FUNCTION


Regards,

Iwan

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