I am having the same problem, but I have two errors. I am not sure what happened (relatively new to VMware). One weekend I got a call from a user saying that the VM was down. This is the error I got.
"The parent virtual disk has been modified since the child was created. The content ID of the parent virtual disk does not match the corresponding parent content ID in the child
Cannot open the disk 'Z:\Timor Originals\Windows 7-000055.vmdk' or one of the snapshot disks it depends on."
"The parent virtual disk has been modified since the child was created. The content ID of the parent virtual disk does not match the corresponding parent content ID in the child
Cannot open the disk 'Z:\Timor Originals\Windows 7-disk2-000056.vmdk' or one of the snapshot disks it depends on.
Module Disk power on failed.
Failed to start the virtual machine."
I am not sure how to fix this or even how it was broken. Can someone look at these files (I hope I have the right ones) and tell me what happened or suggest a fix? If you need more files please let me know.