About unknown symbol : _unlockfilelock

when I run my application on my target,I have this problem.
" unknown symbol:_unlockfilelock "
pls help me ! qnx:6.2.1 host :windows NT 2000
I run my application by Qconn(IP)
My target have demons of MP3 ,there is a same problem when I run that application.
“unkown symbol:_unlockfilelock”

Sounds like the host and target are on a different QNX version.
You said your host is QNX 6.2.1, but your target is a MP3 demon box, maybe it is 3COM’s Audrey with QNX 6.0?

Hi, I have the same problem.

host: Windows 2000, QNX 6.3
target: MPC5200, QNX 6.2.1

Is to update my target to QNX 6.3.0 the only way or is there another solution?


You will have to either upgrade your target, or downgrade your host.

There are some talks that you can install both 6.3 and 6.2.1 on your host machine, so that you can generate executables for either version targets.

Check this thread: