I flashed Jetson Tx2 module with Jetpack but the post installation had some errors , even though i was not able to install the pacakages seperately in Jetson TX2 which had errors in the command like sudo apt-get update etc.
My be it couldn’t connect via network for post installation phase? Ideally, before flashing you connect ethernet cable to Jetson device that is connected to a router. That allows the board to get an ip address via DHCP, then it is determined by jetpack installer and used to process post installation steps.
In that case you could specify execution of post installation steps, specify manually ip address of jetson device and that should possibly resolve the issue, in my opinion.
Need more detail about the error you met. Could you share?