Hi David, My first suspicion is that your setjmp/longjmp is interleaved with C++ exception handling mechanism (regardless if the mechanism is sjlj or something else). Those two mechanisms do not play nice together. Since you are programming in C++, I strongly recommend that you remove all setjmp/longjmp code, and solely use the C++ exception mechanism. If you cannot do that, I strongly recommend that you only use C code inside the context of the setjmp body, which should insure that you never leak an exception out of the context of the setjmp body, nor that you interleave setjmp/longjmp and C++ exceptions. Otherwise, since it interleaving them won't work in software, you'll have to fix the problem in marketing, and have them sell random crashes as a feature. HTH, --Eljay