bug with winkill

Hi,

I can't stop maxima running with the command CTRL+G in XMaxima.
I obtain this error message:

winkill: Could not open file-mapping object.
winkill: Could not open file-mapping object.
    while executing
"exec $maxima_priv(kill) $signal $pid"
    (procedure "CMkill" line 8)
    invoked from within
"CMkill   -INT $pid"
    (procedure "CMinterrupt" line 5)
    invoked from within
"CMinterrupt .maxima.text "
    (command bound to event)

Maxima version is:

Maxima 5.31.1 http://maxima.sourceforge.net
using Lisp GNU Common Lisp (GCL) GCL 2.6.8 (a.k.a. GCL)

OS: Windows 8 64Bits.

Regards.

Laurent.