This database cannot be read due to an invalid on disk structure

What happened

You tried to open an application this release of HCL Notes® cannot interpret. The application may have been created in a newer release of Notes than the one you are using.

What you can do

If you have a newer release of Notes, and you are the owner of the application, open the application in the newer release. While there, if you also want to use the application in the older release, choose File > Application > New Copy and give the application a file extension with the number of the earlier release. For example, if the application was created in Notes 6 and you want to open it in Notes Release 5, save the application with the extension .NS5.

If you don't have a newer release of Notes, ask your administrator to help you open the application and save it in a format appropriate to your release.