My version of App Studio was working fine all day yesterday (and for the past three months, actually).

Early this morning my laptop received Windows Updates. Now when I start up App Studio I get this message:

"Encountered an improper argument."

I can no longer see the Content, Reporting Servers or Portal trees.

I don't know if the Windows Update was responsible or not, but there isn't anything else that has changed on my laptop.

Has anyone else encountered this?

This message has been edited. Last edited by: Squatch,

I managed to fix the problem. The App Studio Environment for my development server got corrupted somehow. I deleted the old one, then created a new one with the same name. When clicking OK to confirm, I was warned that the old Environment name still existed (The one I JUST deleted? How so?).

So I gave it a slightly different name and now everything works again.