Hi Benoit,

I have no solution for you but I would like some explaination.

Does it happen all the time or randomly?

Does it only happen when you make a call with do Form?

I'm asking because I have seen a similar situation where an application is hanging once a a while without no visible reason and I'm looking for a solution since two weeks. Maybe we can share information.

Take a look at microsoft support articles for Q183522

Good luck.