Thanks for the report.
Is that possible that you also provide the server.xml file you are trying to open ?
server.xml I try to open comes from C:\Program Files\Apache Directory Server\conf\server.xml of a ADS 1.5.1 installation on Windows Vista
Thanks for the 'server.xml' file.
This file seems very normal...
Are you using Java 1.6 (or 6.0) ?
Here's a snapshot of the latest version of Apache Directory Studio for Windows -> http://people.apache.org/~pamarcelot/ApacheDirectoryStudio_Trunk_20080114_1500.zip
Could you please try to reproduce the bug on this version ?
This problem, as DIRSTUDIO-224, seems related to the use of the 'getAbsolutePath()' method of the class File (java.io.File) on JRE/JDK 1.6 on WIndows..
I avoided the use of this method and replaced it with something working on Windows with JRE/JDK 1.6.
This issue should be fixed.
Version 1.1.0 has been released.
Closing this issue.