Why do I receive the error "illegal instruction detected" when using MATLAB 6.5 (R13) under IBM?

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Why do I receive the error "illegal instruction detected" when using MATLAB 6.5 (R13) under IBM?
I get the following error when I use commands such as PLOT, BENCH, HELPWIN, DEMO, etc.
------------------------------------------------------------------------
Illegal instruction detected at Fri Sep 27 16:05:21 2002
------------------------------------------------------------------------
Configuration:
MATLAB Version: 6.5.0.180913a (R13)
Operating System: AIX 1 5 0020FEDA4C00
Window System: StarNet Communications Corp. (5223), display
squeegy.ee.columbia.edu:0.0
Current Visual: 0x20 (class 4, depth 24)
Virtual Machine: Java 1.2.2 with IBM Corporation Classic VM
(J2RE 1.2.2 IBM build ca122-20001026 (JIT enabled: jitc))

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 27 Jun 2009
This error is due to the interaction between MATLAB and the JVM. The workaround is to run MATLAB without using the JVM by using the -nojvm flag by typing the following at the UNIX shell prompt:
matlab -nojvm

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