I'm a beginner with hammer++ and map making. I have saved my map made with hammer++ on my desktop named tutorial_3 and i have compiled it. But when I opened the devcon in half life2 , I couldn't find the map. And it says xxx not found or invalid. What should i do?
Second, are you sure that your map was compiled in the right place? Look for a "YourMapName.bsp" file in Steam/steamapps/common/Half-Life 2/hl2/maps. If its not there try to check if its anywhere else, and move it if you have to.
Also check that you have no compiling errors that prevent the map from generating.