nping error

[Snurre <snurre-sprett () broadpark no>]

What could be the reason for this error:

nping.exe --tcp -p 25 10.0.0.1
route_dst_generic: Failed to obtain system routes: getsysroutes_dnet: 
sysroutes_dnet_find_interfaces() failed

Looking throught the sources, I see several points where this fault could
occur. But no way AFAICS to see at which exit-point it actually occurs.
A runtime tracing facility would be nice. Or do I need a debugger to run 
nmap tools?

Nmap seems okay though; "nmap.exe --iflist"  prints:

Starting Nmap 5.59BETA3 ( http://nmap.org ) at 2011-08-29 12:38 GMT
************************INTERFACES************************
DEV  (SHORT) IP/MASK          TYPE     UP MTU  MAC
eth0 (eth0)  10.0.0.6/24      ethernet up 4082 20:CF:30:90:56:99
ppp0 (ppp0)  173.195.0.172/32 other    up 1400
lo0  (lo0)   127.0.0.1/0      loopback up 1520

DEV    WINDEVICE
eth0   \Device\NPF_{8D3A23A7-9C6C-408B-A23B-6736F9E56510}
ppp0   \Device\NPF_{75451EE7-5145-471A-BAF5-124BE8439D10}
lo0    <none>
<none> \Device\NPF_{7F56352E-EF2F-49F4-844C-BA1FA0105667}
<none> \Device\NPF_GenericDialupAdapter
<none> \\.\airpcap00

**************************ROUTES**************************
DST/MASK           DEV  GATEWAY
173.195.255.255/32 ppp0 173.195.0.172
255.255.255.255/32 ppp0 173.195.0.172
173.195.0.4/32     eth0 10.0.0.1
10.0.0.6/32        lo0  127.0.0.1
10.255.255.255/32  eth0 10.0.0.6
255.255.255.255/32 eth0 10.0.0.6
217.13.6.35/32     eth0 10.0.0.1
173.195.0.172/32   lo0  127.0.0.1
217.13.9.15/32     eth0 10.0.0.1
10.0.0.0/24        eth0 10.0.0.6
217.13.0.0/16      eth0 10.0.0.1
127.0.0.0/8        lo0  127.0.0.1
224.0.0.0/4        ppp0 173.195.0.172
224.0.0.0/4        eth0 10.0.0.6
0.0.0.0/0          eth0 10.0.0.1
0.0.0.0/0          ppp0 173.195.0.172

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