I have recently upgraded from Civil 3D 2011 to Civil 3D 2014 and have come across 1 majour issue. I typically create one drawing for each of my pipe networks (water, sanitary and storm) . Each indivual drawing works fine. The speed of the drawing is normal I can swap parts no problem etc etc. When it comes to creating a plan profile drawing I data shortcut my 3 pipe networks into that deliverable and thats where the trouble begins. Once I have data shortcuted a pipe network my drawing comes to a crashing hault. The typical open time for my plan profile drawing is about 3 hours with the 3 pipe networks data shortcuted. The drawing isn't a large file either (3.1mb). I tested out civil 3d 2014 with the last project I completed in Civil 3d 2011. I opened a plan profile in 2011 it took about 1-2 min, the same file took 1.5 hours to open in 2014. Has anyone else come across this issue? I also noticed that opening the plan profile from civil 3d took close to 3 hrs. If civil 3d was open and I opened the drawing from windows explorer it took the same amout of time but if civil 3d 2014 was closed and I opened the drawing from windows explorer it opened in a couple minutes. I am thinking it has something to do with the synchronizing but any input would be greatly appreciated.