Batch file copies all source files into one destination extensionless file instead of the destination folder

I use a post-build script to copy my output DLLs to a开发者_StackOverflow社区nother folder.

Instead of copying each file separately it would create a file with no extension and put all source files to that file (I check this by hexeditor).

This batch file was working before I reinstall my windows (2008 server). What has happened ?

It probably worked before because the target folder was already there. Try creating the folder first or using the correct xcopy switch