This is an error report.
Screenshot of the error

Error details
[all] Error 2 Invoking "make -j8 -l8" failed
This is an error report.
Screenshot of the error
Error details
[all] Error 2 Invoking "make -j8 -l8" failed
It seems you skipped one of the steps before the catkin_make
command.
Please ensure you have run all the commands from the beginning without skipping any steps. I can confirm it works when all steps are followed.
I have same error, thanks
I have the error when calling catkin_cmake after edit unit1_exercise.cpp
Please check this:
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