Feature format error

[travisbrady]

I got this error when experimenting with training, but the same file works with craft-ml.

What is wrong with the feature vector in question?

parabel train data/hack_svml_train.txt
2019-05-10 16:18:41 INFO  [parabel::data] Loading data from data/hack_svml_train.txt
2019-05-10 16:18:41 INFO  [parabel::data] Parsing data
thread 'main' panicked at 'Failed to load training data: Custom { kind: InvalidData, error: StringError("Feature vector is invalid in line 278 13:1 1:1 2:1 102601:1 9:1 156:1 519:1 5037:1 3856:1 311:1 156:1 1078:1 308:1 12:1") }', libcore/result.rs:1009:5
note: Run with `RUST_BACKTRACE=1` for a backtrace.
$ uname -a
Darwin C02QRF6FG8WP 16.7.0 Darwin Kernel Version 16.7.0: Thu Jun 21 20:07:39 PDT 2018; root:xnu-3789.73.14~1/RELEASE_X86_64 x86_64

[tomtung]

Can you provide a small sample training file that can reproduce this error?

[tomtung]

From the given error message, seems like features appeared multiple times in the same line (e.g. 156)