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Just an idea:

For tmux,you have to be aware that the environment you have before you start tmux is the one you get in every new tmux window. So by opening a new tmux window, you do not get a "totally clean" environment, just the environment of the parent process.

Since catkin was designed to use the current environment, this may bite you. E.g. if a tutorial says "Create a new clean shell", opening another tmux window will not help, unless tmux was started from a clean shell.

Just an idea:

For tmux,you have to be aware that the environment you have before you start tmux is the one you get in every new tmux window. So by opening a new tmux window, you do not get a "totally clean" environment, just the environment of the parent process.

Since catkin was designed to use (ab-)use the current environment, this may bite you. E.g. if a tutorial says "Create a new clean shell", opening another tmux window will not help, unless tmux was started from a clean shell.