The problem is related to the “Sentinel Run-time Environment” installer.
It looks like you are trying to run an old installation package that uses an older version of the “Sentinel Run-time” ( version 6.60 ).
The current OptiWave product installers include the “Sentinel Run-time” version 6.64 which resolved installation issues on Windows 8.
We recommend getting the latest installation package of the product.
If the issue still persists I would suggest to contact us directly at “support@optiwave.com”
We would need to ask for the screenshot of the error message and the type of the Operating System ( Windows 7 or 8 or 8.1, is it 32-bit or 64-bit system, what kind “Home Edition, “Professional” or “Enterprise” )