After upgrading model, above compilation errors could be seen without an explicit reason and without any change in the environment. What we could do?
CA Plex 7.2.1 and higher
A re-gen and re-build of (all) the function(s) concerned to a new Gen folder is often sufficient to get rid of these build errors. That is, clear out everything in the Gen folder and re-gen and re-build all functions.
If re-gen and re-build does not help, please contact Broadcom Support.