error: EOF

[re-vax]

When I try to run this tool on my data files I get an error at the #120720 line

# parse-nats-data -d helloadvise/msgs.743.dat -i helloadvise/msgs.743.idx |wc -l
120720

# parse-nats-data -d helloadvise/msgs.743.dat -i helloadvise/msgs.743.idx |tail 
[2019-12-27 15:11:09.515039941 +0000 UTC] seq: 101645846 | size: 507 | offset: 63241652 | crc32: 8ff3dc86
[2019-12-27 15:11:09.515991053 +0000 UTC] seq: 101645847 | size: 535 | offset: 63242167 | crc32: ca57d260
[2019-12-27 15:11:09.516967909 +0000 UTC] seq: 101645848 | size: 454 | offset: 63242710 | crc32: eac3bd70
[2019-12-27 15:11:09.51825422 +0000 UTC] seq: 101645849 | size: 504 | offset: 63243172 | crc32: ddf719f4
[2019-12-27 15:11:09.52005371 +0000 UTC] seq: 101645850 | size: 513 | offset: 63243684 | crc32: fcfe99c4
[2019-12-27 15:11:09.520969322 +0000 UTC] seq: 101645851 | size: 514 | offset: 63244205 | crc32: d8453be
[2019-12-27 15:11:09.5218094 +0000 UTC] seq: 101645852 | size: 513 | offset: 63244727 | crc32: 73fb8f9a
[2019-12-27 15:11:09.522721075 +0000 UTC] seq: 101645853 | size: 514 | offset: 63245248 | crc32: f1902add
[2019-12-27 15:11:09.523895914 +0000 UTC] seq: 101645854 | size: 507 | offset: 63245770 | crc32: 4121cded
error: EOF

on just the same error on subs.dat and clients.dat

# parse-nats-data -s helloadvise/subs.dat 
error: EOF

# parse-nats-data -c clients.dat 
error: EOF

I'm using last version on master branch of nats-streaming server:
VERSION = "0.16.2"

Did the format of data changed since last year?