The file /tmp/sim_cpuids.tmp, which contains the CPU IDs was either removed or overwritten.
This /tmp/sim_cpuids.tmp file is recreated automatically during a reboot.
To get the list of CPU IDs, issue the following command :
# $FW_BOOT_DIR/fwboot cpuid
The output should be similar to this :
3 2 1 0
If the output is correct, then recreate the file manually without rebooting by issuing the following command :
# $FW_BOOT_DIR/fwboot cpuid > /tmp/sim_cpuids.tmp