Splitstream error messages

[durham70]

I have extracted a ty stream from my tivo using sendstream:

bash-2.02# ./sendstream -s 293759 | nc -n -w 5 192.168.1.2 1200
Usinged MfsDevList: /dev/hda10 /dev/hda11 /dev/hdb2 /dev/hdb3
Attempting to locate tyStream with fsid 0x47b7f...
...tyStream located (31744 blocks allocated, 30983 blocks used):
Start Length
01900000 00400000
01d00000 00200000
01f00000 00100000
02000000 00080000
02080000 00010700 (Adjusted from: 00040000)
Progress: 100%

I am now trying to split the stream using splitstream however i get 
the following error for every chunk
Warning: second byte in chunk XXXX is non-zero XX:XX

Any ideas?

Thanks
David