Introduction

You installed VMWare Workstation 7.0, VMWare VIX and the VMWare VSphere  4.2 client, Then you upgraded VMWare Workstation to lets say 7.1.

Figure 1: Too much VMWare

Now you tried to revert a VMWare Workstation snapshot using the vmrun command line utility, but you are getting this strange error:

The Error

Unable to connect to host. Error: The specified version was not found

Figure 2: vmrun returns error

The Solution

You just lucked out big time. This blog post has the solution for your problem.

Search for the file: vixwrapper-config.txt and open it in your favorite text editor. Look all the way to the bottom of the file. You will notice that since you have upgraded to VMWare Workstation 7.1 there is no corresponding mapping entry in this file.

Figure 3: No mapping entry for Workstation 7.1

Add the mapping entry manually:

# Workstation 7.1.0
ws       9  vmdb  7.1.0 Workstation-7.0.0
player   9  vmdb  3.0.1 Workstation-7.0.0

Figure 4: With mapping entry that corresponds to your actual VMWare Workstation version after the upgrade

Save the changes. This should fix the problem.