Bad Request dude to TextArea length

Good day all..!

Dear friends,

In BSP Application i have specified with the  maxLength:254 for TextArea in my Application,

oMatrixBooking.createRow(oLabelRequiredTime, oCellBooking1, oLabelRequiredTimeTo, oCellBooking2 );

     //Employee data details - Reporting Place

     var oLabelReportPlace = new sap.ui.commons.Label({

       id : 'LRP-Name',

       text : 'Reporting Place' });

     var oTAReportPlace = new sap.ui.commons.TextArea({

       id : 'TARP-Value',

       change:function(){oController.getValueState('TARP-Value');},

       required:true,

       width:'200px',

       maxLength:254,

       tooltip : 'Enter your prefered reporting place',

       editable : true,

       //value : 'Corporate Office',

       rows : 2 });

and also in my Netweaver Gateway i have specified Properties -->Precision with 254 even though while creating it in my browser i have an error Bad Request while checking i found,

Thank you.