On a project early in my career, the system deployment involved a group of technicians racing around the country installing hardware in switching and transmission sites in cities as well as some pretty remote areas. One of the technicians made a wrong turn off the main highway on his way to the Picton ferry terminal to come back up to the North Island of New Zealand. Standing by the beautiful shoreline and trying to work out where he was on the map (no GPS back then), a friendly local offered him some assistance.
"Where are you trying to get to?" the local asked.
"The ferry terminal" my colleague replied.
"Ah, you can't get there from here." responded the local.
Sometimes, our projects are like that. You know what needs to be done, but you are not sure how to get there - and when you seek directions or guidance, you seem to hit a wall. People are not usually obstructing you on purpose - they might just not have a wide enough perspective to help you with the big picture.