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I tried again and Turned out that everything works !

For some reason when i compile using Eclipse it marks all the places where i using velocity_derection topic as errors, and writes that they are Unresolved. But still when i tried to run the program it works. i have no idea why it behave in this way.

Nevertheless, I want to thank you KruseT and TommyP for your great help ! Also, if you have, any suggestions why it hapens, I be happy to know.

I tried again and Turned turned out that everything works !

For some reason when i compile using Eclipse it marks all the places where i using velocity_derection topic as errors, and writes that they are Unresolved. But still when i tried to run the program it works. i have no idea why it behave in this way.

Nevertheless, I want to thank you KruseT and TommyP for your great help ! !

Also, if you have, someone have any suggestions why it hapens, happens, I be happy to know.

I tried again and turned out that everything works !the problem is with the eclipse !

For some reason when i compile using Eclipse it marks all the places where i using velocity_derection topic as errors, and writes that they are Unresolved. But still when i tried to run the compilation succeeds and the program it works. i works fine. I have no idea why it behave in this way.

Nevertheless, I want to thank you KruseT and TommyP for your great help !

Also, if someone have any suggestions why it happens, I be happy to know.

turned Turned out that the problem is with the eclipse !

For some reason when i compile using Eclipse it marks all the places where i using velocity_derection topic as errors, and writes that they are Unresolved. But still the compilation succeeds and the program works fine. I have no idea why it behave in this way.

Nevertheless, I want to thank you KruseT and TommyP for your great help !

Also, if someone have any suggestions why it happens, I be happy to know.