Hi I have installed the following DI products : DISQLite - 3.1.5 DIRegEx - 7.1.0 DIContainers - 4.0.0 DIFileFinder - 5.0.0 and now when I try to install DIZipWriter 4.5.0, I get the following message : [DCC Fatal Error] DIStreams.pas(1840): F2051 Unit DIZipWriter was compiled with a different version of DIStreams.TDIWriter I have accumulated all files into the DIZipWriter folder and added the different source files with the registration information. Am I missing something or is the difference in the versions from DIRegEx and DIZipWriter causing problems with the DISQLite, DIContainer and DIFileFinder which is older ? I'm using Delphi Professional XE2 on a 64 bit Windows 7, building the 32 bit editions (removing the Zip component and compiling using the DISQLite component with the other added except from the ZipWriter works ok). Regards Eirik