isim.log

ISim log file
Running: C:\xilinxProjects\DES\test_top_isim_beh.exe -intstyle ise -gui -tclbatch isim.cmd -wdb C:/xilinxProjects/DES/test_top_isim_beh.wdb 
ISim P.20131013 (signature 0x7708f090)
This is a Full version of ISim.
Time resolution is 1 ps
# onerror resume
# wave add /
# run 1000 ns
Simulator is doing circuit initialization process.
Finished circuit initialization process.
ERROR: at 0 ps: Iteration limit 10000 is reached. Possible zero delay oscillation detected where simulation can not advance in time because signals can not resolve to a stable value in File "C:/xilinxProjects/DES/generateSubkeys.v" Line 68. Please correct this code in order to advance past the current simulation time.
 in File "C:/xilinxProjects/DES/generateSubkeys.v" Line 68 
ERROR: 
INFO: Simulator is stopped.
ISim P.20131013 (signature 0x7708f090)
This is a Full version of ISim.
# run 1000 ns
Simulator is doing circuit initialization process.
Finished circuit initialization process.
ISim P.20131013 (signature 0x7708f090)
This is a Full version of ISim.
# run 1000 ns
Simulator is doing circuit initialization process.
Finished circuit initialization process.
ERROR: at 0 ps: Iteration limit 10000 is reached. Possible zero delay oscillation detected where simulation can not advance in time because signals can not resolve to a stable value in File "C:/xilinxProjects/DES/generateSubkeys.v" Line 90. Please correct this code in order to advance past the current simulation time.
 in File "C:/xilinxProjects/DES/generateSubkeys.v" Line 90 
ERROR: 
INFO: Simulator is stopped.
ISim P.20131013 (signature 0x7708f090)
This is a Full version of ISim.
# run 1000 ns
Simulator is doing circuit initialization process.
Finished circuit initialization process.
ISim P.20131013 (signature 0x7708f090)
This is a Full version of ISim.
# run 1000 ns
Simulator is doing circuit initialization process.
Finished circuit initialization process.