First, you need to check how many pcf files are created, then you need to find out if these deplicated dwg drawings are based on the same or different pcf files. CAESAR will create several pcf files for one big model like yours, but I don't think CAESAR will create two pcf files for the same protion of piping system. You can send me your CAESAR II file, I will take a look and find out the solution.
Regards,
Shawn Zhong
Engineer/Developer
CADWorx & Analysis Solutions
Shawn.Zhong@intergraph.com,
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Shawn Zhong
CADWorx & Analysis Solutions
Intergraph Process, Power, & Marine