file path in example code ref #2

docs/web/docs/Libtraci.md

@@ -83,6 +83,9 @@ import as above.
 
 ### Example Code (test.cpp)
 
+The example assumes you have the named sumocfg file in your current working directory and the SUMO bin directory included 
+in the PATH environmental variable. Otherwise you need to provide the full file path.
+
 ```cpp
 #include <iostream>
 #include <libsumo/libtraci.h>