Is anybody successfully using the PATS API for automated trading of eminis? If so, could you please tell me which development system and which operating system you are using. I have been trying for several months to get the API working on a Win'98 machine using GNU 'C'. Borland C++ and Microsoft VB but all applications run into the same problem - when the app is closed the patsapi.dll does not free from memory causing any future running of the app to fail. Only a reboot frees the dll. This is obviously very frustrating during the development phase. PATS support tell me this does not happen on Win2K or WinNT machines but has anyone written a working app on one of these O/S's?