Is it possible to transfer support boundary condition created in revit into etabs? I have tried to do so, but it is not defined in etabs.
Hey @akashah 
Welcome to the community and thanks for posting your question.
This is expected current behaviour - the boundary conditions won’t be applied in ETABS. The workflow of Revit to ETABS is primarily focused on geometry and the associated sections and materials. Primarily because the assigning of boundary conditions was seen as something taken care of in ETABS.
We are, however, always keen to gather more information on these types of requests. Are assignments such a boundary conditions, loads, links etc. coming from Revit critical to your workflow(s)? What would the ideal scenario be for you (i.e. what does the desired workflow look like?).