Autodesk are currently planning to address this issue in an upcoming hotfix, but in the meantime, here is the issue and the workaround....
Select a file that was under lifecycle control
- Switch to the List view to Change State.
- Select a different state within the grid and a tooltip error message appears "Object must implement IConvertible"
The workarounds are to:-
- Switch to another view (Not List View)
- Press the esc button to remove the red circle.
As the workaournds are quite simple, it has not been given a high priority. However, more and more customers are requesting that this be addressed. Autodesk is therefore considering bundling a fix for this in a soon to be released hotfix.