Create symbolic links to the directions.xml and resources.xml files in $HOME/arcgis/engine9.4/NetworkAnalyst/Directions.For example,assuming that engine runtime is installed in a directory called arcgis within your home directory1)Create the following folder structure ~/arcgis/engine9.4NetworkAnalyst/Directions2) cd into the ~/arcgis/engine9.4NetworkAnalyst/Directions directory3) run the following two commandsln -s ~/arcgis/engine9.4/NetworkAnalyst/Directions/directions.xmlln -s ~/arcgis/engine9.4/NetworkAnalyst/Directions/resources.xml