This question concerns WinXP and realtime, MIDI-controlled performance 
.csd's.

I've three separate folders, one each containing the following files from 
5.06, 5.09 and 5.10:

csound32.dll.5.1 (csound32.dll.5.2 in the case of 5.10)
stdopcod.dll
csound.exe
libsndfile-1.dll
pmidi.dll
portaudio.dll
portmidi.dll
porttime.dll
pthreadGC2.dll
rtpa.dll
rtwinmm.dll

These are the only Csound files required to render my compositions. *No 
environment variables are set* and .csd's are run from within these folders. 
(Please note that the way I've set up things, multiple versions of Csound 
can easily be run from unique directories on the same computer - with no 
environment variables set. Just put everything for one version in a single 
directory. You may need no more files than the above dozen or so, plus your 
.csd's.

Problem: Whereas standalone Lettuce executables run fine in each of the 
three folders, only 5.06 runs *from the command line* correctly. 5.09 and 
5.10 issue the following error when Ctrl-C is pressed:
Csound tidy up: Interrupt
Csound tidy up: Segmentation violation (as always - *so* helpful!)
pm_winmm_term called
begin closing open devices...

and the system hangs.

Note there is no .csoundrc file, and that I'm defaulting to PortMIDI. My 
CsOptions include -M11 (my MIDI device). All installations use files from 
the float Windows installers.

Everything worked so well in 5.06.

Why should 5.09 and 5.10 fail (at the command line only)?

Art Hunkins