Java error during installation

Optional data exception.png

Error message

During installation of IMSMANG the error message "Internal error occurred: java.io.OptionalDataException".
The installation was interrupted and not all files were copied to the C:\IMSMAng folder.
Unusual update of the environment variable PATH was also observed.

The error was caused by a defective USB memory stick OR the files got damaged when they were copied to the USB memory stick.

  1. Deleting the C:\IMSMAng folder
  2. Correcting the environment variable PATH
  3. Restart of the computer
  4. Using another USB memory stick

solved the issue.