in qnx website they said it can be supported by devn-tigon3.so in qnx6.3,I try to copy it to /lib/dll in qnx6.2.1 and use “io-net -d tigon3 -p tcpip” to drive it,the result is upset,Can it work in qnx6.2.1?
No, you could try to copy io-net and tcpip from 6.3.0 as well but that is totaly unsupported setup and like walking on thin ice.
You could try copying your application to 6.3. 