Tip: The directory of your MPLAB project can cause problems.

If the path size of your MPLAB project's directory is too long, for example:

C:\Users\Main\Desktop\ritchie-thai\current-projects\aer201

then a .hex file will not be created.

I am now using a workspace with the much shorter path:

C:\mplab-test\KeyPad_LCD

Don't computers suck?