My old delphi 7 application was using devart Interbase driver to connect with mydatabase.fdb. When I migrated this application to delphi xe4, I installed latest version of devart interbase for delphi xe4. But with this version, I am getting following error:

```
Unsupported on-disk structure for file mydatabase.fdb

```

What is the cause of this error? How should I get rid from it?

I found the link: <http://www.firebirdfaq.org/faq80/>

2 reasons are mentioned there for possible causes for this error. But I think these are not applicable to me. Then why am I getting this error?