Migrating from SQL Server 2008 R2 (no replies)

Hi,i'm trying to migrate from SQl Server 2008 R2 but i have this error in the reverse engineer selected schemata

File "C:\Program Files (x86)\MySQL\MySQL Workbench CE 6.0.7\modules\db_mssql_grt.py", line 62, in execute_query

return get_connection(connection_object).cursor().execute(query, *args, **kwargs)

pyodbc.ProgrammingError: ('42000', '[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]The data types nvarchar and text are incompatible in the equal to operator. (402) (SQLExecDirectW); [42000] [Microsoft][ODBC SQL Server Driver][SQL Server]Statement(s) could not be prepared. (8180)')

and and i'm trying to edit the Data Type mapping but it don't save the modification

note:i'm very new in my sql