that's odd. Can you open an issue on github 
(https://github.com/web2py/pydal/issues) with a simple example to reproduce 
it? I'll have a look in the next few days

Paolo

On Saturday, May 9, 2015 at 11:54:30 AM UTC+2, Claudinei Fernandes wrote:
>
> Hi,
>
> Has anyone used "auth.signature" attribute with MSSQL database?
> For me it is returning the following error:
>
> <class 'gluon.contrib.pypyodbc.ProgrammingError'> (u'42000', u"[42000] 
> [Microsoft][ODBC SQL Server Driver][SQL Server]Introducing FOREIGN KEY 
> constraint 'signature_test_modified_by__constraint' on table 
> 'signature_test' may cause cycles or multiple cascade paths. Specify ON 
> DELETE NO ACTION or ON UPDATE NO ACTION, or modify other FOREIGN KEY 
> constraints.")
>
> Can anyone help me please?
>

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