On Dec  1 19:27, nu774 wrote:
> After upgrading to Windows 10 TH2 (ver 1511, build 10586), any attempt
> to launch a cygwin64 process from 32bit native app (for example,
> C:\windows\syswow64\cmd.exe) *always* results in a fork error.
> 
> To be precise, I can execute 64bit bash.exe from 32bit cmd.exe.
> However, this bash process never succeeds in forking a child (ls or
> something).
> Also, I cannot launch 64bit mintty.exe from 32bit cmd.exe. It always
> fails in a error dialog saying that:
> 
> mintty: could not detach from caller
> Try '--help' for more information.
> 
> When launching from 64bit app, this issue doesn't happen.

I created a workaround for this issue and uploaded new developer
snapshots to https://cygwin.com/snapshots, as well as a new Cygwin
test release 2.4.0-0.7 with this change
(https://cygwin.com/ml/cygwin-announce/2015-12/msg00001.html)

Please give any of them a try.


Thanks,
Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat