I, like others, am having trouble getting the two UDF's mentioned above to work correctly. I successfully compiled MySQL 4.0.14 dynamically with the -rdynamic flag on Linux 8. I have also compiled the udf_example.cc file using the -shared option. Everything seems to go OK when I'm using the CREATE FUNCTION command to add the avaiable UDF's until I get to lookup and reverse_lookup. On these two, I get the following error message: ERROR 1127: Can't find function 'reverse_lookup' in library ERROR 1127: Can't find function 'lookup' in library I checked the func table in the mysql database, and I see where it created the entries for the other functions, so I know it's not a permissions problem. Has anyone out there run into this one and found an answer?