PDR0728W
Section, Line number, Column number; Function function: The file specified (filename) is empty.
What happened: The file you specified in the function function call was empty. Nothing could be looked up. Section identifies the rule file that contains the errant function call. filename identifies the empty LOOKUP file.
What to do: Make sure you specify the correct LOOKUP file in the function call. Make sure the string, start, and length parameters are set correctly. A %%RC value of 3 indicates in the rule file that the LOOKUP file was missing or empty.