questions about tntp files

[Yifeng007duan]

i wonder how do i create a tntp file, use what software, transcad? or just using txt file and name the suffix with .tntp?
and also, when running datapreparation with tntps download from [bstabler TransportationNetworks], it reports an error:

`element_no, element_value = element.split(":") # get our pair
28 # beware, these two are now most likely padded strings!
29 # that's why we'll strip them from whitespace and convert to integer/float

ValueError: not enough values to unpack (expected 2, got 1)
`