Connection to PLC project

I have ERROR when I try simulation my simple project, please help me, why Visual Componets cant write value to PLC project? I dont have physical PLC, I use PLCSIM with Nettopclsim:s7o, TIA Portal v15

Impossible to say anything without more information. Does the output panel or the VC engine log file have any related error messages?

where can i find this file?

Similar to:
C:\Users\%username%\AppData\Local\Visual Components\Visual Components Premium 4.2\Logs\

My guess is that you have some configuration issue in PLCSim or NetToPlcSim.
NetToPlcSim comes with a pretty thorough manual, see if that can help.