I have a mystery when using the 'Play Pages' button on the top right of the playground. One particular file, which has been through several versions, never appears in the drop-down list on clicking this button. It is in the play-cache, and I access it by opening the file from the file explorer with WordPad, then copying and pasting into the playground. More mysteriously, having got at in this way, as a test I closed the playground containing it, then clicked the 'Play Pages' button in a new empty playground; the mystery file was there at the top of the list. Close down Pharo and restart, click 'Play Pages' in a new playground, the file is missing again. Is there anything I should be doing to ensure it is accessible? I have tried closing the playground before I shut down Pharo, and alternatively leaving it open and letting the Pharo shut-down close it. Does 'Play Pages' work by examining the contents of the 'play-cache' folder, or does it maintain its own list of files? I am using 32-bit Moose Suite 6.1 (Pharo 6.0 Latest update: #60541) on Windows 10. Many thanks for any help Peter Kenny