Using Version OWNet 2.7p27
If path to a ressource contains a null character, which seems to happen sometimes when concatenating strings, the parsing in ownet stops. PHP does not stop on \0 and simply ignores it, but
e.g. ow->dir("/20.41B806000000\0/alarm") only gives the directory of "/20.41B806000000"
Debugging is quite ugly, since php prints still without the \0 character and a characterwise examinations show \0 in the middle of strings.