TRandom3-related Seg Fault

Dear All,

I am running into a problem trying to generate a random number with TRandomX::Rndm(), for X = 2,3, which causes a seg fault. See below. Any suggestions on what I can/should do?
Yes, this problem occurs after a fresh boot.

Thanks,
richard

Here is my OS info:
Linux version 2.6.35-28-generic (buildd_at_allspice) (gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5) ) #50-Ubuntu SMP Fri Mar 18 18:42:20 UTC 2011
x86_64

ROOT info:
ROOT 5.18/00b (branches/v5-18-00-patches_at_22563, Apr 06 2010, 02:11:00 on linuxx8664gcc)
CINT/ROOT C/C++ Interpreter version 5.16.29, Jan 08, 2008

~/Desktop/PS08$ root -l
TDR Style initialized
TDR Style initialized
root [0] TRandom3::Rndm()

• Break *** segmentation violation Attaching to program: /proc/3915/exe, process 3915 Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf ptrace: Operation not permitted.
  /home/richard/Desktop/PS08/3915: No such file or directory.
  error detected on stdin Root > root [1] root [1] .q ~/Desktop/PS08$ root -l TDR Style initialized TDR Style initialized root [0] TRandom2::Rndm()
• Break *** segmentation violation Attaching to program: /proc/4126/exe, process 4126 Could not attach to process. If your uid matches the uid of the target process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf ptrace: Operation not permitted.
  /home/richard/Desktop/PS08/4126: No such file or directory.
  error detected on stdin Root > root [1] .q