Hello @gabriel.costa ,
unfortunatelly I resolved my problem with OPC only for a while, when I clean my project (delete Binary, Diag, Temp) a have done things mentioned above… But when I worked with project and tried to make changes in OPC (uad) then the file breaks 
and I have errors again… Now I wait for virtual PC where I am going to install AS 4.12.9 and try to start with uad from there… I will let you know if this help or not.