In my case, I has a customized OPCFHDR in the project. You will need to compare it to the updated version shipped with AutoPLANT and make sure it contains all the new values for jacketed pipe etc. Best bet might be to compare the two files (Beyond Compare or other text comparison software), the merge over all of your customizations into a copy of the updated version shipped with AutoPLANT.
Hope that helps!
