I ran this program on three machines, two in Windows 7 and one in Linux.
wxdraw2d(explicit(x^2,x,-5,5));
build_info();
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Results:
Windows 1: Graph and this build info:
build_info("5.28.0-2","2012-08-27 23:16:48","i686-pc-mingw32","GNU Common Lisp (GCL)","GCL 2.6.8")
On this computer, I install Maxima in the Program Files folder.
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Windows 2: No graph and this error message:
Maxima encountered a Lisp error:? Error in SETF [or a callee]: Cannot create the file C:/Users/Wilson/maxout.gnuplot.
Automatically continuing. To enable the Lisp debugger set *debugger-hook* to nil.
The build info is this:
build_info("5.28.0-2","2012-08-27 23:16:48","i686-pc-mingw32","GNU Common Lisp (GCL)","GCL 2.6.8")
On this computer, I install Maxima in the Program Files (x86) folder.
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Linux: A graph and this build info:
build_info(version="5.29.1",timestamp="2013-01-23 09:18:19",host="i686-pc-linux-gnu",lisp_name="SBCL",lisp_version="1.0.55.0.debian")