Hi and welcome to the forums
I will need a little more info to try to troubleshoot your issue, this is what I normally need so please fill in the gaps
1. DVDStripper/Ifoedit/DVDDecrypter version Numbers
2. Operating System
3. Full Description of error (attach Printscreen snapshots if possible)
4. Exactly when the error occurred
5. File source (DVD or Image)
6. You are using the above programs with installed VB RT files