I want to show a warning message in user interface side in my module in a particular condition.For that I have write the code like this.

raise osv.except_osv(('Warning!'), ("Entered Quantity is greater than quantity on source."))

But in that condition in user interface side it just showing the loading image.

At the console I got the error like this.

2013-06-10 09:45:53,612 364 ←[1;31m←[1;49mERROR←[0m None openerp.netsvc: Warning! Entered Quantity is greater than quantity on source. Traceback (most recent call last): File "C:\OpenErp\openerp\openobject-server\openerp\netsvc.py", line 361, in dispatch_rpc result = ExportService.getService(service_name).dispatch(method, params) File "C:\OpenErp\openerp\openobject-server\openerp\service\web_services.py", line 585, in dispatch res = fn(db, uid, params) File "C:\OpenErp\openerp\openobject-server\openerp\osv\osv.py", line 167, in execute_kw return self.execute(db, uid, obj, method, *args, *kw or {}) File "C:\OpenErp\openerp\openobject-server\openerp\osv\osv.py", line 121, in wrapper return f(self, dbname, args, *kwargs) File "C:\OpenErp\openerp\openobject-server\openerp\osv\osv.py", line 176, in execute res = self.execute_cr(cr, uid, obj, method, args, *kw) File "C:\OpenErp\openerp\openobject-server\openerp\osv\osv.py", line 164, in execute_cr return getattr(object, method)(cr, uid, args, *kw) File "C:\OpenErp\openerp\openobject-addons\mat_mgmt\mat_mgmt.py", line 101, in button_confirm raise osv.except_osv(('Warning!'), ("Entered Quantity is greater than quantity on source.")) except_osv: ('Warning!', 'Entered Quantity is greater than quantity on source.')

c:\openerp\openerp\openobject-addons\mat_mgmt\mat_mgmt.py(101)button_confirm() -> raise osv.except_osv(('Warning!'), ("Entered Quantity is greater than quantity on source."))

I want to show the warning message on user interface side.