Unable to save any proc/function

1. open proc/func in HeidiSQL
2. add single space into routine body / save
3. I guess save is here same as execute in mysql query browser ?
4. Any impossible error, forinstance: SQL error duplicate parameter.

"Save" sounds totally different than "Execute", I guess QB just fires/calls the routine. Anyway. So you get some "Duplicate parameter" when modifying a routine? Can you please post the results of

SHOW CREATE PROCEDURE `your_routine`

?