Webviz bagfile has empty connections

[enliden96]

Which operating system are you using?

OS

• [ x] Linux
• Windows
• macOS

Architecture

• [ x] amd64
• arm64
• arm7
• arm6

Describe the issue

I'm trying to drop a bagfile recorded from radar data topics published by goroslib into Webviz, but when I do, Webviz tells me that the bagfile has empty connections. The bagfile runs fine in rviz. There seems to be a problem with inconsistent md5 checksums.

Thanks in advance for answers! I will forward the whole error message below:

This bag has some empty connections, which Webviz does not currently support. We'll try to play the remaining topics. Details:

[{"offset":66778612,"dataOffset":66778654,"end":66778800,"length":188,"conn":1,"topic":"/tf","type":"tf2_msgs/TFMessage","md5sum":"94810edda583a504dfda3829e70d7eec","messageDefinition":"","callerid":"/PC2_test_pub","latching":false},{"offset":66778800,"dataOffset":66778852,"end":66779019,"length":219,"conn":2,"topic":"/PC2_Radar_FL","type":"sensor_msgs/PointCloud2","md5sum":"1158d486dd51d683ce2f1be655c3c181","messageDefinition":"","callerid":"/PC2_Radar_testNode","latching":false}]

[aler9]

Hello, i checked the MD5 sums of the message types contained in your logs:

• tf2_msgs/TFMessage has 94810edda583a504dfda3829e70d7eec in both C++, Python and goroslib
• sensor_msgs/PointCloud2 has 1158d486dd51d683ce2f1be655c3c181 in both C++, Python and goroslib

Therefore, the issue can't be replicated. Please make sure that

• you're using ROS noetic
• you're using the latest version of goroslib
• you're using the latest version of the reference implementation