assembly was created in SW 2011 and is opening in SW 2017 but not in SW 2011 , getting error - an error was encountered while trying to open the file
assembly was created in SW 2011 and is opening in SW 2017 but not in SW 2011 , getting error - an error was encountered while trying to open the file
That error message can mean so many things. You did not perhaps save the assembly or any of its parts when it was open in SW2017. SW2011 cannot open SW2017 files.