So,I have purchased 2 new spools of PVA from local dealer, and I dried my existing spools using the Ultimaker suggested process. One of the new spools loads OK. Print starts and runs for 4 hrs. The I get an error 56. Have to pull the power plug to clear the error and the I have to manually remove the filament as the unload feature is grayed out. That's another failed print. Next I try my dried filament. Run the load sequence and get Error 57. Pull power plug, try different bay, loads but doesn't reach extruder. During the priming process no material is extruded unless I apply force to move the filament along. This only works for a few seconds an another error 57 pops up. When reverting back to original S5 sans material station, PVA loads and prints OK. Sometimes I get message that the filament has run out? Seems like PVA is a real PIA!!