Troubleshooting

You right-click in PlotJuggler and the menu you expect does not appear — or appears somewhere unexpected, or not at all. This symptom appeared in this site’s own search data (users searching variants of “right click doesn’t work”), so this guide exists — but it is written honestly, as a checklist rather than a bug…

PlotJuggler has a speed reputation — it is documented as handling thousands of timeseries and millions of data points with fast OpenGL rendering — so when a large log makes it feel slow, something specific is usually costing you, and it is worth separating what is slow before changing anything. Loading a file, holding it…

An .mcap file is sitting on your disk, PlotJuggler is supposed to read MCAP — and it will not open. Of all the file problems on this site, this is the one where which PlotJuggler line you are running decides everything, because PJ3 and PJ4 reach MCAP by genuinely different routes. This guide separates the…

PlotJuggler itself opens fine. The problem is narrower and more frustrating: the ROS 2 side of it is not there — no topic subscriber, no rosbag loading, as if the ROS plugin never loaded. Because ROS support in PlotJuggler is a separate plugin package, “the plugin is not loading” usually means one of four checkable…

You downloaded the PlotJuggler AppImage, double-clicked it — and nothing happened. No window, no message, just nothing. That silent failure is the normal failure shape for AppImages, and it almost always comes down to a short list of checks: the file is not marked executable, your system’s glibc is too old for this build, the…

Drag-and-drop is PlotJuggler’s whole interaction model, so when it stops working the tool feels broken in a way a menu failure never does. Users describe this symptom to search engines — including in this site’s own search data — with phrases like “drag and drop doesnt work”, but that one phrase hides two different gestures…

You dropped a file into PlotJuggler, or picked it from the open dialog, and instead of curves you got a refusal — the experience users describe, and search for, as a “no such plugin” problem. The wording matters less than what it reveals: in PlotJuggler, opening a file is a plugin’s job. If no installed…