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It's easier if you post the errors as text.
It's telling you it can't find a file - so does that file actually exist on your system? If it does exist, is it where it should be?
The screenshot shows that over 3,000 warnings and 1 error prevented the AXF from being built. I guess that the one error was a missing example_lab8.o file. If that's translated from an assembly language file, then I guess that it failed on pre-processor directives and C-style comments embedded in the file.
To fix that, either rename the file to have a .S (capital S) extension or pass the compiler the option -x assembler-with-cpp