Hi ,
I need to hide one group of fields on the basis of current field value .. The issue is I don't get the value for current table field in after.form.read or before.program section so I think I cant use group.invisible .Is there any other way to do the same ?

I did use inputfield.invisible(..) and inputfield.visible(..) to hide and unhide fields on the mask depended on the Input of an other field. Calling in when.field.changes section will work.

When the fields are hidden an empty space on the form where the fields are located will remain.

Try to use in before.display.object

Hide Group of fields
Refer to - disable.group() (http://www.baanboard.com/programmers_manual_baanerp_help_functions_form_and_form_field_operations_disable_group)