Any one faces those kind of errors in lvs check and could help? LVS reports: net count difference = 275 device count difference = 0 unmatched nets = 4 unmatched devices = 1 unmatched pins = 0 property failures = 0

Does your user_project_wrapper contain standard cells? I faced this problem when in the user_project_wrapper, I put some glue logics. Finally, I chose to put them into the macro and then in user_project_wrapper, I only assemble these macros. It run much faster.

No, I'm instanciating my design as a macro inside the user_project_wrapper and don't have any logic around it:(

You should look at the logs to see what actually happened. It can be caused by DRC error, bad floorplan (orientation of macros) and so on.

@Mariam Zanaty If you post your lvs log, I'll take a look at it.