Hi Venkat,
For i5Chart time bar appears only if the Query Template used isTimeBased.. i.e., if i5chartObj.getQueryTemplate().isTimeBasedQuery() evaluates to true.
For Xacute Query, isTimeBasedQuery() would return true only if it has either a mapped start date or mapped end date.
Hence, as a first step you could check the value of isTimeBasedQuery() for your Xacute Query and also verify if you have mapped atleast a start/end date.
In case of further queries please also do mention the MII version that you are using.
Hope this helps!
Thanks and Best Regards,
Ria