View source for Error When Using MATLAB Symbolic Math Toolbox on Linux

<!--Originally written by: Derek Poon-->
<!--Originally written on: 2008-Jan-11-->

Users of MATLAB 7 on Linux have reported that any attempt to perform symbolic
calculations results in "Invalid MEX-file" error, as in this session:

<pre>
syms a b;
a+b;

??? Invalid MEX-file '/opt/matlab7/toolbox/symbolic/maplemex.mexglx': /opt/matlab7/bin/glnx86/libmaple.so: symbol errno, version GLIBC_2.0 not defined in file libc.so.6 with link time reference.

Error in ==> maple at 104
[result,status] = maplemex(statement);

Error in ==> sym.maple at 85
[result,status] = maple(statement);

Error in ==> sym.plus at 22
X = maple(A(:),'+',B(:));
</pre>


This bug is due to an incompatibility between the Maple library code and the
C library on your system.

If you are using ''tcsh'' as your shell, the workaround is to set an
environment variable before invoking MATLAB:

<pre>
setenv LD_ASSUME_KERNEL 2.4.19
matlab
</pre>

If you are using ''bash'' as your shell, the workaround is:

<pre>
LD_ASSUME_KERNEL=2.4.19 matlab
</pre>