Bug 141255 No error for the incompatible parameter value
Steps to reproduce: 1.New a decimal parameter, set the default value to "aaa" 2.Preview the report by "Preview" tab Expected result: Error to say the incompatible parameter value Actual result: Parameter request page keeps poping up till input the decimal value Note: if preview in Web Viewer, error will be thrown out, but no exception description.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/presentation/aggregation/parameter/ComboBoxParameterFragment.java
parameterBean.setValueInList( true );
				}
			}
		}
	}
	private Collection getParameterSelectionListForCascadingGroup(
			IViewerReportDesignHandle design, IViewerReportService service,
			Map paramValues, InputOptions options ) throws ReportServiceException
	{
		
		ParameterGroupDefinition group = ( ParameterGroupDefinition ) parameter
				.getGroup( );
		int index = group.getParameters( ).indexOf( parameter );
		Object[] groupKeys = new Object[index];
		for ( int i = 0; i < index; i++ )
		{
			ParameterDefinition def = ( ParameterDefinition ) group
				.getParameters( ).get( i );
			String parameterName = def.getName( );
			groupKeys[i] = paramValues.get( parameterName );
			if ( groupKeys[i] == null )
			{
				groupKeys[i] = service.getParameterDefaultValue( design,
						parameterName, options );
			}
		}
		return service.getSelectionListForCascadingGroup( design, group
				.getName( ), groupKeys, options );
	}
}