Hello Zopistas I created an extension (a hit counter) that includes the class definition in the same source file as the method. After a couple of days ZopeHTTPServer crashed without any apparent reason. On restarting I got the following errors in the server.log file: Traceback (innermost last): File "serve.py", line 99, in ? ZopeHTTPServer.main(args) File "/home/pavlos/Zope-1.9.0b2-src/ZopeHTTPServer/ZopeHTTPServer.py", line 456, in main start(module_file,host,port,threading,env) File "/home/pavlos/Zope-1.9.0b2-src/ZopeHTTPServer/ZopeHTTPServer.py", line 405, in start set_published_module(module_file,BoboRequestHandler,env) File "/home/pavlos/Zope-1.9.0b2-src/ZopeHTTPServer/ZopeHTTPServer.py", line 401, in set_published_module __import__(name) # to catch problem modules right away File "/home/pavlos/Zope-1.9.0b2-src/lib/python/Main.py", line 103, in ? Bobobase=OFS.Application.open_bobobase() File "/home/pavlos/Zope-1.9.0b2-src/lib/python/OFS/Application.py", line 319, in open_bobobase app._setObject('Control_Panel', cpl) File "/home/pavlos/Zope-1.9.0b2-src/lib/python/BoboPOS/PickleJar.py", line 261, in setstate state = unpickler.load() SystemError: Failed to import class Counter from module __main__ As I understand the problem has to do with pickle not finding the class definition. I assume that the External methods object uses exec to load and store only the function definition into Zope/BoboPOS and not any other code that finds in the source file. I hacked Main.py and included a from Counter import Counter but it did not work. So now I am stuck without Zope :-( Also the change was made 2 days ago and all objects from there on include refrences to the counter object. Am I missing something simple or have I messed things up badly? Pavlos