Where can I report a QuestaSim bug?

I'm new to this community. I would like to report a bug in QuestaSim. Where and how can I do this?

My testbench (< 1000 lines of VHDL code) causes a segmentation fault in QuestaSim.

Regards

   Patrick

# Attempting stack trace sig 11

# Signal caught: signo [11]

# vsim_stacktrace.vstf written

# Current time Thu Sep 03 23:39:47 2015

# QuestaSim Stack Trace

# Program = vsim

# Id = "10.2c"

# Version = "2013.07"

# Date = "Jul 19 2013"

# Platform = win64

# End of Stack Trace

# Loading std.standard

# Loading std.textio(body)

# Loading ieee.std_logic_1164(body)

# Loading ieee.numeric_std(body)

# Loading poc.my_config(body)

# Loading poc.utils(body)

# Loading poc.arith(body)

# Loading ieee.math_real(body)

# Loading poc.my_project(body)

# Loading poc.config(body)

** Fatal: (SIGSEGV) Bad pointer access. Closing vsimk.

** Fatal: vsimk is exiting with code 211.

(Exit codes are defined in the QuestaSim messages appendix

of the QuestaSim User's Manual.)