If you are trying a ticket in this train and not able to get. Try following option. Get a ticket in Avadh Express, which runs just before it and generally TTE are able to accomodate you in Avadh by charging differential fare between UR and SL. Get down at Dahod. At Dahod, on the same platform on which you get down from Avadh, after few minutes comes 22901. So you can have nice sleep in avadh and then spend rest of day journey in 22901. I have tried it myself once.