Thank you so far. Here is an excerpt from the gdb session after a crash:
? Program received signal SIGSEGV, Segmentation fault.
? 0xb7509a6b in Rf_allocVector () from /usr/lib/R/lib/libR.so
? (gdb) backtrace
? #0 ?0xb7509a6b in Rf_allocVector () from /usr/lib/R/lib/libR.so
? #1 ?0xb744b64c in ?? () from /usr/lib/R/lib/libR.so
? #2 ?0xb74c58bf in ?? () from /usr/lib/R/lib/libR.so
? #3 ?0xb74c9c62 in Rf_eval () from /usr/lib/R/lib/libR.so
? #4 ?0xb74ce60f in Rf_applyClosure () from /usr/lib/R/lib/libR.so
? #5 ?0xb74c9f29 in Rf_eval () from /usr/lib/R/lib/libR.so
? #6 ?0xb7503002 in Rf_ReplIteration () from /usr/lib/R/lib/libR.so
? #7 ?0xb7503298 in ?? () from /usr/lib/R/lib/libR.so
? #8 ?0xb7503812 in run_Rmainloop () from /usr/lib/R/lib/libR.so
? #9 ?0xb7503839 in Rf_mainloop () from /usr/lib/R/lib/libR.so
? #10 0x08048768 in main ()
? #11 0xb728de46 in __libc_start_main (main=0x8048730 <main>, argc=8, ubp_av=0xbfdb7824, init=0x80488a0 <__libc_csu_init>,?
? ? ? fini=0x8048890 <__libc_csu_fini>, rtld_fini=0xb7784590, stack_end=0xbfdb781c) at libc-start.c:228
? #12 0x08048791 in _start ()
It seems to me that the error is in frame #0. Does it mean that there is a bug in libR.so? ?What can I do next?
Greetings
Donatella