Customer reports unable to deploy CFv 2.1.6 to ESXi 5.5 host.
Issue reproduced on two separate ESXi 5.5 support lab hosts.
No error or issues deploying to ESXi 6.0 host. Only a problem on 5.5.
Googling the error, it seems that this can occur if the disk is left in virtual DVD drive when the OVA is exported, but that does not appear to be the case in this instance.