Unable to share projects, not using vault just the standard shared projects in inventor. keep gettinr a llock file come up in the file. wondering if there in some way of checking in the file so that my assicate may work on the same project.
In Inventor, got to Tools > App' Options > "Enable creation of Legacy Projects". Create a new Shared Project that points its Workspace to the location of your problem files. Join this project. Open the offending file(s) and change the browser to show the sharing status (sorry - it's been a few years since I last did this!) You should be able to Undo checkout - or Steal checkout. (Again, age clouds my memory!)
If you are familiar with Vault and you have lots of these files, run them through Autoloader and check them into Vault. Part of the Autoloader clean-up process is to remove the extended-entity data that flags these files as checked out.