Let’s say you want to delete a file as a part of your SSIS package and let’s say that the file is created during the executions of the package. Simple – you use the File System Task. You just add the task to the package and create a file connection manager to point to the file…only the file doesn’t exist yet. The file connection manager editor won’t let you leave the file name pointing to a file that doesn’t exist.
Simple fix – All you have to do is use the properties window in SSIS instead of the dialog that comes up when you double click the connection manager. Doesn’t look like DelayValidation is required here.