Second edit: Problem solved. We pushed the source code through Windows, which created a few strange symlinks that referred to rosbridge scripts. I updated the CMakeLists.txt in the rosbridge_server folder (removed mentions of .py files) and made sure the scripts in the scripts folder had no .py ending. It works now.

Edited; See at the bottom for the new error.

This issue occured out of the blue after a colleague changed something on the rosbridge package. The error message I receive is:

ERROR: cannot launch node of type [rosbridge_server/rosbridge_websocket]: can't locate node [rosbridge_websocket] in package [rosbridge_server]

We faced an error of symlinks, where git complained that filename too long, which we "fixed" by deleting the offending files in rosbridge_suite-develop/rosbridge_server/scripts and only leaving the .py files. On my side, however, this somehow broke rosbridge and it does not start.

It is a very confusing issue and I am not that versed in ROS. So I hope you guys have a few hints where I can look for errors.

• I did source devel/setup.bash correctly, as well as ros/indigo/... and so on.
• I also reverted to an earlier commit (before my colleague, unbeknownst to him, changed the files in rosbridgeserver). The change included deleting a call to `./rosbridgetcp.py` from the top of a file with no signature that my OS thought was a symlink. When reverting, rosbridge does start. But I do need the new features from newer commits as well...

Thanks for your help, and sorry for the confusing question!

Edit: After I changed all the script's permissions to +x in the rosbridge_server/scripts folder, I now get a new error message:

/home/martin/CrESt/SIM/CrESt_simulator/sim/src/rosbridge_suite-develop/rosbridge_server/scripts/rosbridge_websocket: line 3: ./rosbridge_websocket.py: No such file or directory

But the file is right there! The process dies and rosbridge is never launched. Why does this happen?