MotionBuilder error reading registry key during uninstall

This case illustrates a common troubleshooting technique for some install/uninstall problems: deleting the Installer registry key.
Way back when I started support Softimage, this was how we fixed problems like “Uninstall says Softimage already uninstalled”, even though that was not true.

In a recent MotionBuilder case, the customer got this error when he tried to uninstall MotionBuilder 2011:

There was an error reading the registry key SOFTWARE\autodesk\motionbuilder\2011//defaultproductkey.

The solution:

  1. In the Registry Editor, find this key:
  2. Search for MotionBuilder in the Data.
  3. You should find a DisplayName value under an InstallProperties key.

    The full key name will be something like:

  4. Export the key (as a backup) and then delete it. For example, on machine, I would delete this key:
    On your machine, the key name may be different than “83E7ADBE34330A442ACF348F731E5F87”
  5. Try again to uninstall MotionBuilder.

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