Good day,

current environment : python 2.7.6.1      and     web2py 2.9.11
updating to               : python 2.7.6.1      and     web2py 2.15.4

Does the older version of python could be creating the following error : 
"Value error : insecure string pickle"

Here is the traceback.

Traceback (most recent call last):
  File "P:\web2py_2_15\gluon\restricted.py", line 219, in restricted
    exec(ccode, environment)
  File "P:/web2py_2_15/applications/Batterie/models/db.py", line 51, in 
<module>
    auth.define_tables(username=False, signature=False)
  File "P:\web2py_2_15\gluon\tools.py", line 2216, in define_tables
    super(Auth, self).define_tables(username, signature, migrate, 
fake_migrate)._table_signature_list
  File "P:\web2py_2_15\gluon\authapi.py", line 350, in define_tables
    format='%(first_name)s %(last_name)s (%(id)s)'))
  File "P:\web2py_2_15\gluon\packages\dal\pydal\base.py", line 587, in 
define_table
    table = self.lazy_define_table(tablename, *fields, **args)
  File "P:\web2py_2_15\gluon\packages\dal\pydal\base.py", line 621, in 
lazy_define_table
    polymodel=polymodel)
  File "P:\web2py_2_15\gluon\packages\dal\pydal\adapters\base.py", line 
797, in create_table
    return self.migrator.create_table(*args, **kwargs)
  File "P:\web2py_2_15\gluon\packages\dal\pydal\migrator.py", line 295, in 
create_table
    sql_fields_old = pickle.load(tfile)
  File "P:\python\PythonDevKey\Portables\Portable Python 
2.7.6.1\App\lib\pickle.py", line 1378, in load
    return Unpickler(file).load()
  File "P:\python\PythonDevKey\Portables\Portable Python 
2.7.6.1\App\lib\pickle.py", line 858, in load
    dispatch[key](self)
  File "P:\python\PythonDevKey\Portables\Portable Python 
2.7.6.1\App\lib\pickle.py", line 966, in load_string
    raise ValueError, "insecure string pickle"
ValueError: insecure string pickle

-- 
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- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
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