I have a nice new 64-bit Windows 8 laptop. But when I say make -j2 then it launches a couple processes (which I think complete fine) and then locks up with 'make' consuming 25-35% of a CPU, but nothing happening. No further activity for 30 mins. This is msys 'make', version 3.81, which worked fine on my old (32-bit) laptop. Things work ok without -j. But validate uses -j (how to disable that?). Does anyone have a clue about how I might find out what is going on? I don't think msys has 'strace'. Thanks Simon Microsoft Research Limited (company number 03369488) is registered in England and Wales Registered office is at 21 Station Road, Cambridge, CB1 2FB