NOT_IMPLEMENTED C:/ob/bora-19175/bora/devices/mainmem/mainMemCpt.c:786

[akap]

While trying to revert my Vm Image on external USB hard disk i am getting a crash with following message

VMware Workstation unrecoverable error: (vcpu-0)

NOT_IMPLEMENTED C:/ob/bora-19175/bora/devices/mainmem/mainMemCpt.c:786

Have i just corrupted my virtual HD? Any known workarounds?

[KevinG]

How is this external USB hard disk formatted? (FAT32, NTFS)

Keep in mind that the Max file size for FAT32 is 4GB and your virtual disk maybe larger

I would recommend that you upgrade to VMware Workstation 5.5.3 when you have a chance, since your existing license key will work with the newer version.