AssertionError: Unable to handle package.xml format version '3

[myc00]

Has anyone encountered this problem? it occured when excuting "catkin build refusion"

[myc00]

os : ubuntu18.04

[Eman7C7]

format version 3 sounds really weird. It should be version 2. Have you modified the file?

[liaoksn]

format version 3 sounds really weird. It should be version 2. Have you modified the file?

the same issue. I meet this problem without modifying the file ， is there any advice ？ it may be solved by " sudo pip install -U rosdep rosinstall_generator wstool rosinstall
"