Hello, I have run into what seems to be a bug in FileStream/StandardFileStream. I attempt to open a file. f := StandardFileStream oldFileNamed: 'pathToFile'. If file is open elsewhere for editing, f = nil. If the file is not open elsewhere, then the file opens properly. If I attempt to open read only. f := StandardFileStream readOnlyFileNamed: 'pathToFile'. Opens the file properly. It seems to me that returning nil is an ugly response. I had no knowledge why the file was not opening. At the time did not know I had it open in another application. Failing silently is not nice. I would have preferred an Error message or something telling me that the file was open elsewhere and even possibly letting me open as readOnly. When we attempt to open a file with a filename that does not exist, we get the nice option of either selecting (or correcting) a file name which exists or creating a new file with the specified name. With a small amount of naive browsing, I was not able to find where the understanding of the file being locked elsewhere is found. So I only offer my experience. Thanks. Jimmie