graphic: 0.781 device: 0.773 semantic: 0.732 files: 0.709 vnc: 0.704 other: 0.698 performance: 0.679 network: 0.637 socket: 0.634 permissions: 0.634 PID: 0.500 debug: 0.423 boot: 0.359 KVM: 0.306 qemu-img convert file.vmdk: Invalid footer Steps to reproduce - Open ESXi 6.5 Web UI - Export OVF - qemu-img convert disk.vmdk disk.qcow2 Error: qemu-img: Could not open './disk-1.vmdk': Invalid footer I found another person having this problem here: https://forum.proxmox.com/threads/error-converting-vmdk-file-to-qcow2-file.38264/ As I guess from the answer, the guy went over to manually copy the flat file from the datastore instead of using the ovf-exported file. Nevertheless, I think this bug should be investigated further and closed. Probably it is just some metadata issue and should not be too hard to fix once the root of the problem is found. I just compiled the version in the master branch and the same error occurred. Probably my image was corrupt since it works with another image. So this bug can be closed.