I am working on a complex assembly containing a number of similar parts. I have one "master" part to which the geometry of all of the other parts is related within the assembly (i.e. I brought the parts in under-defined and created relations to the "master"). After creating a number of these parts I made a small change to the "master" part and found that many of the relations I had previously created had been broken, leaving the parts under-defined.
Can anyone suggest a way to fix this, or alternatively, another way of approaching the assembly setup?