OpenVPN Support Forum

Mon May 09 11:18:46 2011 write to TUN/TAP [State=AT?c Err=[c:\openvpn-build\openvpn-2.2-rc2\tap-win32\tapdrvr.c/2473] #O=2 Tx=[60,0] Rx=[0,2] IrpQ=[1,1,16] PktQ=[0,3,64] InjQ=[0,1,16]]: The data area passed to a system call is too small. (code=122)
Mon May 09 11:18:56 2011 write to TUN/TAP [State=AT?c Err=[c:\openvpn-build\openvpn-2.2-rc2\tap-win32\tapdrvr.c/2473] #O=2 Tx=[98,0] Rx=[0,3] IrpQ=[1,1,16] PktQ=[0,7,64] InjQ=[0,1,16]]: The data area passed to a system call is too small. (code=122)

Anyone else running into this?

is this 2.2.0?
what version of windows?

check the MTU size of the tap-win32 adapter vs the value specified with '--tun-mtu' .

krzee wrote:is this 2.2.0?
what version of windows?

It was 2.2.0 and Windows 7. I downgraded to 2.1 release to test, and it worked fine.

FWIW:
I was just able to reproduce this error by misconfigured a server and a client: the server did 'comp-lzo', the client did not. In this case I also see 'error=122' messages.