opcontrol sh: write error: Invalid argument

Hi Everyone,

Recently I cross-compiled Oprofiler for MIPS.
When  I run --start, I'm getting 'write error'.  Details are below:

# pwd
/root
# export OPROFILE_EVENTS_DIR=/root
# ./opcontrol --deinit
dump fail: daemon died during last run ?
Detected stale lock file. Removing.
# ./opcontrol --no-vmlinux
# ./opcontrol --reset
# ./opcontrol --init
# ./opcontrol --event=CYCLES:1000:0:1:1
# ./opcontrol --status
Daemon not running
Session-dir: /var/lib/oprofile
Event 0: CYCLES:1000:0:1:1
Separate options: none
vmlinux file: none
Image filter: none
Call-graph depth: 0
# ./opcontrol --start
sh: write error: Invalid argument
Using 2.6+ OProfile kernel interface.
Using log file /var/lib/oprofile/samples/oprofiled.log
Daemon started.
Profiler running.


Unfortunately my sh isn't giving me a line number along with that error.
Any help would greatly appreciated.

oprofiled.log:
oprofiled started Tue Nov 30 00:46:05 1999
kernel pointer size: 4
Failed to exec opjitconv: No such file or directory
oprofiled: open of /var/lib/oprofile/samples//current/{root}//bin/busybox/{dep}/{root}//bin/busybox/INSTRUCTIONS.100000.0.all.all.all failed: Invalid argument
...


Thankyou so much!
Andrew

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