I2CWRITE not writing anything on PIC18F45K80

[HenrikOlsson]

Well, yes!

Since the compiler doesn't generate code for the extended instruction set the XINST config setting is set to OFF in the default configuration files for the devices that has that option.

Are you saying that is not the case for 45K80 and that there's a problem with the default config?

My humble guess is no, probably not. Instead you took a decision to change a default setting without knowing what it does. Things went south and once again it's the tools fault.

I'm not saying PBP and it's documentation is without shortcomings but, as has been proven, people don't read the documentation anyway. For example, can you honestly say that you went looking for XINST in the PBP manual BEFORE you decided to change that setting to ON or BEFORE tumbleweed pointed you the problem?

If you DID look for it in the manual you would've seen that every time it IS mentioned it shows the setting being OFF but you STILL decided to change it to ON and blame the tool.