[R] Hanging -- please help decipher event report

I'm running some code in R64 on a Mac OS 10.6.8 that calls a C program through the dyn.load() function. The code hangs after several days of computation, and I've having trouble locating the problem. Can anyone decipher this info from the error report, and tell me if this is a problem in R64, or in

Re: [R] Hanging -- please help decipher event report

Thanks for your reply. At line 144 I call R_CheckUserInterrupt(). I added this because otherwise, R would not respond to the user for thing like switching over to the window until the C code exited back to R. I then moved that command into a loop where it should occur quite frequently, because I th