UTL_FILE.WRITE_ERROR when calling utl_file.put in a loop

Question

I have below code in my PL/SQL procedure, which I called in API_XXX.put(it calls utl_file.put) in a while loop. And the l_xmldoc is CLOB from a function of getR

Answer 1

Just a guess, but instead of "to_char(10)" you might try chr(10) to determine/write a newline. Not sure if this will solve your problem, but sometimes very long lines (without newlines) can cause issues.

For example:

declare
    l_clob clob;
    l_char char;
begin
    l_clob := 'Line 1' || chr(10) || 'Line 2' || chr(10);

    for i in 1 .. DBMS_LOB.GETLENGTH(l_clob)
    loop
        l_char := dbms_lob.substr(l_clob, 1, i);

        if (l_char = chr(10)) then
        --if (l_char = to_char(10)) then
            dbms_output.put_line('Found a newline at position ' || i);
        end if;
    end loop;

end;

Notice the difference between chr(10) and to_char(10). Easy enough to test if this solves your problem anyway.