Hi,
I have a ZClass-based product ClassA.
 
Then, I create a folder: $INATANCE_HOME/Products/ClassA
 
And Then `touch refresh.txt` under that folder.
 
And also create a __init__.py (for allowing PythonScripts to use more modules.)
 
After all, I execute manage_refresh to fresh my ClassA(thought, the "Refresh" tab doesn't show up).
 
Below is what I got:
---------------------------------------------------------------

An exception occurred during the last refresh.
Exception type: Duplicate Class Ids
Exception value: None 

Traceback (innermost last):
  Module App.RefreshFuncs, line 182, in performSafeRefresh
  Module App.RefreshFuncs, line 171, in performRefresh
  Module OFS.Application, line 759, in reinstall_product
  Module OFS.Application, line 637, in install_product
   - __traceback_info__: eNotice
  Module App.Product, line 524, in initializeProduct
  Module OFS.ObjectManager, line 272, in _setObject
  Module OFS.ObjectManager, line 280, in manage_afterAdd
  Module ZClasses.ZClass, line 419, in manage_afterAdd
  Module ZClasses.ZClass, line 373, in _register
Duplicate Class Ids
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Can I take this issue as a "bug" or I shouldn't abuse ZClass/Refresh like that.
Thanks for your attention.
Iap, Singuan