Out of memory

Not that this will happen too often, but it might point to a "memory/resource" issue.
if you open a project, then within the environment open another "recent" project, then open the first, now "recent" project, then open the other...after a couple of iterations, B4a blows up with a memory issue.

I have the same issue with my app.
I did notice that if you don't execute/swap too quick from a screen to another,
it'll be fine.
But unfortunately users don't think about that, so 'force close' will be inevitable.

Rusty is writing about a memory issue in the IDE not the application,

That is correct, Erel.
It occurs only in the environment.
It is not a big problem, but I thought you should know. There is (likely) a memory leak somewhere.