Installation – Fatal Error: Unable to Determine Previous Install Path


Fatal Error: Unable to determine previous install path. DataKeeper cannot be uninstalled or reinstalled.


When performing a “Repair” or “Uninstall” of DataKeeper, the “ExtMirrBase” value is missing in the installation path of DataKeeper in the registry under HKLM\System\CurrentControlSet\Control\Session Manager\Environment.

Suggested Action

Perform one of the following:

• Under the Environment key, create “ExtMirrBase” as a REG_SZ and set the value to the DataKeeper installation path (i.e. C:\Program Files(x86)\SIOS\DataKeeper).

• To force InstallShield to perform a new install of DataKeeper, delete the following registry key:


This should be the installation key created by InstallShield for the DataKeeper product.


Was this helpful?

Yes No
You indicated this topic was not helpful to you ...
Could you please leave a comment telling us why? Thank you!
Thanks for your feedback.

Post your comment on this topic.

Post Comment