Trying to convert doors and windows from Sims3 to Sims 4

Converting doors and windows requires multiple steps, but it sounds like you haven't created a proper cutout for the items and you haven't assigned the bone for door movement to the new mesh. Also sounds like you need to separate the mesh into the proper groups correctly and create the shadow lods as well but without pictures it is hard to tell what is happening. I am not familiar with the mesh setup of the build objects from TS3, but i am going to assume they are not the same to ts4. By providing pictures of each of the issues, myself and others are going to be in a better position to help out and point you in the right direction.