hello frendzzzz

[2011-05-30 23:22:29,568][mes_demo] ERROR:test:Tests failed to execute in module account_analytic_plans
Traceback (most recent call last):
File "/home/adsoft/openerpv6.02/openerp-server-6.0.2/bin/addons/__init__.py", line 670, in load_test
_load_data(cr, module_name, id_map, mode, 'test')
File "/home/adsoft/openerpv6.02/openerp-server-6.0.2/bin/addons/__init__.py", line 693, in _load_data
tools.convert_yaml_import(cr, module_name, file, id_map, mode, noupdate)
File "/home/adsoft/openerpv6.02/openerp-server-6.0.2/bin/tools/yaml_import.py", line 793, in yaml_import
yaml_interpreter = YamlInterpreter(cr, module, idref, mode, filename=yamlfile.name, noupdate=noupdate)
AttributeError: 'cStringIO.StringO' object has no attribute 'name'

i have an error like this

i created new database and started installing modules like sale management,warehouse etc etc and i face this error. can any1 tell me how to avoid this ??