On server activation with one of my plugins it say "[AMXX] Function could not be found (name "DispatchKeyValue") (Plugin "Amx_AvAMvM.amxx")". Yet the plugin compiles correctly.
Edit: The function can be found in engine.inc and it compiles correctly on amxx .16 but not TP4. I would use amxx .16 but there's a function in .20 that I need to make this plugin work. And if I try compiling it with the native in the plugin on amxx .16 I come up with the same error.