First my environment. Mac OS 10.5.1 (Darwin 9.1.0) gcc version 4.0.1 (Apple Inc. build 5465) readline-5.1 gnump-4.2.1 cln-1.1.9 GiNaC-1.4.1 I get a coredump when I run the first example from section 2.1 of the GiNaC 1.4.1 Tutorial, revision 5 September 2007. Here is the stack trace. Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000002 0x00000002 in ?? () (gdb) bt #0 0x00000002 in ?? () #1 0x006d6480 in cl_module__cl_prin_globals__firstglobalfun () at output/cl_prin_globals.cc:6 Cannot access memory at address 0x6 I built my program like this: g++ -I/usr/local/include -L/usr/local/lib src/tut.cpp -lginac I also tried adding -lcln -lgmp and -lreadline to the link but the result was the same. This same error happens when I attempt to run ginsh. I was concerned during the build when configure said: === The following minor problems have been detected by configure. === Please check the messages below before running "make". === (see the section 'Common Problems' in the INSTALL file) == Unsupported version of libreadline. == I could not run a test of libreadline (needed for building ginsh). Configuration of GiNaC 1.4.1 done. Now type "make". I ignored this and built anyway since I don't plan to use ginsh, just the library. Perhaps the issues are unrelated. Please help me to get started with building and running the tutorial examples. Ken Smith