Native dynamic SQL in PL/SQL package

[oradbadmin]

Hi,
I've this problem.
I know that with O8i it's possible to use the EXECUTE IMMEDIATE statement for dynamic SQL instead of using DBMS_SQL.
However when i put this istruction in my package compilation failed. Follow ther is the code nad the error:

CREATE OR REPLACE PACKAGE BODY package AS

PROCEDURE proc (
.............,
.............,
errorCode OUT NUMBER,
errorText OUT VARCHAR2) IS


EXECUTE IMMEDIATE 'GRANT SELECT ON SDH_PROV_SUPPORT.SPS_AMPLIAMENTO_SCHEDE TO ' || userName';

EXCEPTION WHEN OTHERS THEN
errorCode := sqlcode;
errorText := sqlerrm;
............
............

END proc;
.........
.........
END package

PLS-00103: found the symbol "
EXCEPTION WHEN OTHERS THEN
errorCode := sqlcode;
errorTe" instead of one of the following:
. ( * @ % & = - + ; < / > at in mod not rem return returning
<> or != or ~= >= <= <> and or like
between into using is null is not || is dangling

Without the EXECUTE IMMEDIATE statement the package compile and work fine.

Thanks for your suggestion.

[vbaskar]

EXECUTE IMMEDIATE 'GRANT SELECT ON SDH_PROV_SUPPORT.SPS_AMPLIAMENTO_SCHEDE TO ' || userName';

i donn see anything wrong with the exec immd...check the single quote(') after username which wouldve caused an error

[oradbadmin]

Thanks vbaskar but it was a mistake when i wrote the post.
However I solved the problem re-writing the package...
May be an ascii character problem occurred during a cut and paste?
But now work fine!!