I have tried this a couple of times now on AX 2012 R3.
I need to do major changes to a form, and during the work it is convenient for me to try and compile the form to get an idea about what I still miss to fix. Sometimes the compilation however makes the AX client crash.
The darnedest thing is that AX automatically tries to compile the same form when I restart the client, still resulting in a client crash. So what to do?
My new best friend, Set-AXModelStore -InstallMode comes to the rescue, allowing me to open the client without it starting to compile the form. See my earlier post about Set-AXModelStore -InstallMode comming to the rescue.