No output rows on select to ORACLE from PHP

Hi everybody, I'm using php4 to connect to an oracle8i database. I'm using the ora_* functions instead of the oci_* functions for simplicity of the script that should also connect to an oracle7 database. I hope this not be the problem. Well, all works fine, the connection, the parse of a SQL statement and the fetch of rows from a cursor when there are rows selected from the result of the execution of the SQL statement. However when there is no rows on the cursor, then the ora_fetch returns FALSE (which is OK) and also displays a warning message like this: Warning: Ora_Fetch failed (ORA-01722: invalid number -- while processing OCI function OFETCH/OFEN) in /usr/local/htdocs/revisa.php on line 32 and the ora_error() function show the following: Error while trying to retrieve text for error ORA-00000 I wonder what could be this problem and how can I solve it? it's ugly to show the users those messages, is there a way to avoid the printing of any warning message in PHP? Thanks in advance, ---sram