Problem with exercise 4.3

Hello,
I have a problem with this exercise because no matter what I do i can’t publish the Age message cause I get an error saying that theres no module names exercise_33 (the generic solution, copy-pasted it after my didn’t work to test), i tried a few solutions but none of them worked. What more can I do?

Solution:
I forced removed the build and devel directiores (rm -rf /build /devel) then made another catkin_make and it worked like a charm

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