Hi Steven,

I'll add this to the bug tracker soon, but wanted to let you know: since updating to Csound 6.01 and using it with the latest blue in API mode, I am seeing blue die with a JRE crash on a regular basis. This seems to happen after doing two or more disk renders. Was not happening until I switched from command-line mode to API mode. It has been happening consistently since I switched back to API mode with the latest Csound.

Environment:
- Xubuntu 12.10
- JDK 1.7.0_25
- Csound 6.01 (built from latest Git release/6.01 branch)
- blue 2.5 3, using Csound API

blue console output for a representative session:

[blue] - initialization

program root directory: /home/dave/work/stasisfield-2013
user configuration directory: /home/dave/.blue

> loading classes from registry
0dBFS level = 32768.0
Csound version 6.01.0 (double samples) Oct 20 2013
libsndfile-1.0.25
WARNING: could not open library '/usr/local/lib/csound/plugins64-6.0/libwidgets.so' (/usr/local/lib/csound/plugins64-6.0/libwidgets.so: undefined symbol: fl_graphics_driver)
WARNING: could not open library '/usr/local/lib/csound/plugins64-6.0/libstk.so' (/usr/lib/x86_64-linux-gnu/libstk.so.0: undefined symbol: _ZN8RtMidiInC1ESsj)
WARNING: could not open library '/usr/local/lib/csound/plugins64-6.0/libvirtual.so' (/usr/local/lib/csound/plugins64-6.0/libvirtual.so: undefined symbol: fl_graphics_driver)
UnifiedCSD:  /tmp/dummy7272078472927671286.csd
STARTING FILE
Creating orchestra
Creating score
rtaudio: ALSA module enabled
rtmidi: ALSA Raw MIDI module enabled
Elapsed time at end of orchestra compile: real: 0.002s, CPU: 0.000s
sorting score ...
... done
Elapsed time at end of score sort: real: 0.003s, CPU: 0.000s
Csound version 6.01.0 (double samples) Oct 20 2013
graphics suppressed, ascii substituted
0dBFS level = 32768.0
orch now loaded
audio buffered in 256 sample-frame blocks
writing 1024-byte blks of shorts to /tmp/dummy4114278955633944557.wav (WAV)
SECTION 1:
new alloc for instr 1:
B  0.000 ..  0.010 T  0.010 TT  0.010 M:      0.0      0.0
Score finished in csoundPerform().
resetting Csound instance
inactive allocs returned to freespace
end of score.   overall amps:      0.0      0.0
  overall samples out of range:        0        0
0 errors in performance
Elapsed time at end of performance: real: 0.003s, CPU: 0.000s
512 1024 sample blks of shorts written to /tmp/dummy4114278955633944557.wav (WAV)
0dBFS level = 32768.0
Csound version 6.01.0 (double samples) Oct 20 2013
libsndfile-1.0.25
Python Library Directory set to: /home/dave/blue/blue/pythonLib/standard:/home/dave/blue/blue/pythonLib/blue:/home/dave/.blue/pythonLib
Python Interpreter has been reinitialized
<TOTAL_DUR> = 420.0
<RENDER_START> = 0.0
<PROCESSING_START> = 0.0
Global Duration = 420.0
0dBFS level = 32768.0
Csound version 6.01.0 (double samples) Oct 20 2013
libsndfile-1.0.25
resetting Csound instance
0dBFS level = 32768.0
Csound version 6.01.0 (double samples) Oct 20 2013
libsndfile-1.0.25
<TOTAL_DUR> = 320.0
<RENDER_START> = 0.0
<PROCESSING_START> = 0.0
Global Duration = 320.0
0dBFS level = 32768.0
Csound version 6.01.0 (double samples) Oct 20 2013
libsndfile-1.0.25
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x0000000000000000, pid=22487, tid=139782959687424
#
# JRE version: 7.0_25-b15
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C  0x0000000000000000
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home/dave/work/stasisfield-2013/hs_err_pid22487.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
/home/dave/blue/bin/../platform/lib/nbexec: line 572: 22487 Aborted                 "/opt/jdk1.7.0_25/bin/java" -Djdk.home="/opt/jdk1.7.0_25" -classpath "/home/dave/blue/platform/lib/boot.jar:/home/dave/blue/platform/lib/org-openide-modules.jar:/home/dave/blue/platform/lib/org-openide-util.jar:/home/dave/blue/platform/lib/org-openide-util-lookup.jar:/home/dave/blue/platform/lib/locale/boot_ja.jar:/home/dave/blue/platform/lib/locale/boot_pt_BR.jar:/home/dave/blue/platform/lib/locale/boot_ru.jar:/home/dave/blue/platform/lib/locale/boot_zh_CN.jar:/home/dave/blue/platform/lib/locale/org-openide-modules_ja.jar:/home/dave/blue/platform/lib/locale/org-openide-modules_pt_BR.jar:/home/dave/blue/platform/lib/locale/org-openide-modules_ru.jar:/home/dave/blue/platform/lib/locale/org-openide-modules_zh_CN.jar:/home/dave/blue/platform/lib/locale/org-openide-util_ja.jar:/home/dave/blue/platform/lib/locale/org-openide-util-lookup_ja.jar:/home/dave/blue/platform/lib/locale/org-openide-util-lookup_pt_BR.jar:/home/dave/blue/platform/lib/locale/org-openide-util-lookup_ru.jar:/home/dave/blue/platform/lib/locale/org-openide-util-lookup_zh_CN.jar:/home/dave/blue/platform/lib/locale/org-openide-util_pt_BR.jar:/home/dave/blue/platform/lib/locale/org-openide-util_ru.jar:/home/dave/blue/platform/lib/locale/org-openide-util_zh_CN.jar:/opt/jdk1.7.0_25/lib/dt.jar:/opt/jdk1.7.0_25/lib/tools.jar" -Dnetbeans.dirs="/home/dave/blue/bin/../blue:/home/dave/blue/bin/../ide:" -Dnetbeans.home="/home/dave/blue/platform" '-Xms256m' '-Xmx768m' '-Djava.library.path=/usr/lib/jni' -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath="/home/dave/.blue/dev/var/log/heapdump.hprof" org.netbeans.Main --userdir "/home/dave/.blue/dev" "--branding" "blue" 0<&0

I can also provide the blue project I've been using as well as the JVM error report log.

- Dave