Converting a vmx file to ovf file (error while doing so)

Hello

I am running a Ubuntu 10.04 host system. Using the ovftool i tried to convert a ".vmx" file to ".ovf" file.

Here is the command that i used for the purpose.

$ sudo -tt=ovf ovftool "/mnt/test/cent.vmx"  "/mnt/test/cent1.ovf"

I got the following error after running this command.

I dont what the problem is.

Please help.

Thank you,