I have used a similar technique in DTS packages. When testing a certain part of a DTS package and unable to monitor its progress I'll go to where I want the package to stop and put a line of code in a task that will fail to force the package to stop at just the right spot. This way I don't have to worry that it completes and imports data when the data is not ready or a transformation is not working right (and this has happened to me a time or two).

Robert Marda