# Why does requesting build delete files which are not part of stream

 0 Karthik Krishnan (859●3●89●127) | asked Sep 11 '12, 6:59 a.m. edited Sep 11 '12, 9:01 a.m. I have a "Command line - Jazz build engine" whose main task is to get the contents from the stream on to a folder, which contains files and folders which are not part of Stream. (they cannot be part of any stream)    In the build definition I have unchecked "Delete directory before loading" What happens is that whenever a build is requested, the build deletes all the files which are not part of Stream. My expectation was that the build will update the workspace without deleting the existing contents. Is this the expected behavior of the build ?\ we are using RTC 4.0