Posted on December 3, 2018VBoxManage: error: Configuration error: Failed to get the “MAC” value (VERR_CFGM_VALUE_NOT_FOUND) Failure to start a Virtualbox VM results in the following error: jonas@yggdrasil:~/EdgeXfoundry$ vboxmanage startvm node-1 --type headless Waiting for VM "node-1" to power on... VBoxManage: error: Configuration error: Failed to get the "MAC" value (VERR_CFGM_VALUE_NOT_FOUND) VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole The reason was port forwarding settings for one of the NICs. These settings had been set: VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/Protocol" TCP VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/GuestPort" 48080 VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/HostPort" 48080 Removing these settings can be done by using the same commands but without values: VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/Protocol" VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/GuestPort" VBoxManage setextradata node-1 "VBoxInternal/Devices/pcnet/0/LUN#0/Config/rpirestinput/HostPort"
