Can't start guest after enabling nictrace with VBoxManage

[Steve Lemke]

From the command line, I attempt to enable nictrace by typing the following:

VBoxManage modifyvm "vmname" --nictrace1 on --nictracefile1 /Users/me/nictrace1.pcap

When trying this on OS X Leopard with VBox 3.1.6, I am able to run "VBoxManage startvm" but after I get "Remote session has been successfully opened" and the VM window appears, an error dialog immediately appears indicating "Failed to start the virtual machine vmname." and "Unknown error creating VM (VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES)." Expanding the Details section shows Result Code: NS_ERROR_FAILURE (0x80004005), Component: Console, Interface: IConsole {6375231a-c17c-464b-92cb-ae9e128d71c3}."

When trying this on OS X Snow Leopard with VBox 3.2, I get the following output in the console:

Oracle VM VirtualBox Command Line Management Interface Version 3.2.2 (C) 2005-2010 Oracle Corporation All rights reserved.

Waiting for the VM to power on... ERROR: Unknown error creating VM (VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES) Details: code NS_ERROR_FAILURE (0x80004005), component Console, interface IConsole, callee

VBoxManage showvminfo "vmname" | grep -i nic returns the following, so it is able to parse the options: NIC 1: MAC: 0800274FE239, Attachment: NAT, Cable connected: on, Trace: on (file: /Users/me/nictrace1.pcap), Type: Am79C973, Reported speed: 0 Mbps

Once I disable nictrace the vm is once again able to start just fine.

Is nictrace broken or am I somehow configuring it wrong?

[Steve Lemke]

Attaching VBox.log from failure case