it came to me that i am unable to save back to an early version of revit.
This means when i work with a company using revit 2012 it is not possible to exchange my model, only by .ifc format.
Only solution i can think off, is to keep my template and families up tot date in both versions.
This doubles the work since i am still in working progress with my companies standard.
Then when i get a revit model to work with, i first have to ask witch version they used for it, and work my plan in that same version.
If there is a better way, or suggestions on this please let me know.
I mostly want only to carry on in revit 2013.