Procdure fails 2nd time executed

Question

I have a procedure (below) that is executed by a WHEN-BUTTON-PRESSED trigger. The first time in a session that I push the button, executing the procedure, it's successful, the second time, my form just goes blank and locks up. I've narrowed it down to the query itself "select max(yr) from...", the message before it shows up the second time, but then immediately locks up. Seems like something is being held onto.
Procedure called by the WHEN-BUTTON-PRESSED trigger:
PROCEDURE set_fy_parameter IS
l_yr VARCHAR(4) := NULL; -- NULL doesn't matter, doesn't work either way.
BEGIN
Message('YEAR '||l_yr);
SELECT MAX(FY) INTO l_yr FROM sum_mth_SALES;
Message('YEAR Set to '||l_yr);
END;

Answer 1

If your procedure does sth else e.g. you said, a query, other than the code you listed in your quest,i.e.,
PROCEDURE set_fy_parameter IS
l_yr VARCHAR(4) := NULL; -- NULL doesn't matter, doesn't work either way.
BEGIN
Message('YEAR '||l_yr);
SELECT MAX(FY) INTO l_yr FROM sum_mth_SALES;
Message('YEAR Set to '||l_yr);
END; --I believe this code will not 'lock' anything
you may debug it thru stepping in, to see the difference b/w the first and second call.
besides, thru the error, it seems it is likely the version compatible issue too. so use your new version builder to open your 6i form and compile it then see what happens.
--------error ora-06508-------
ORA-06508     PL/SQL: could not find program unit being called
Cause:     An attempt was made to call a stored program that could not be found. The program may have been dropped or incompatibly modified, or have compiled with errors.
Action:     Check that all referenced programs, including their package bodies, exist and are compatible.