When I was setting up the environment, I followed the manual up to the compilation step. I have configured the environment as instructed, but halfway through compilation, Keil5 threw an error. I installed Keil at E:\Keil_v5, but it reports an error saying UV4.exe cannot be found in C:\Keil_v5.
Originally downloaded to the C drive, then manually moved to the E drive, causing the compilation to fail as Keil could not be found through the registry lookup.