Photoshop cc 2017.0.1 displays the message "no open document!" if data is in buffer — OSX 10.10.5
(Yosemite 10.10.5)
PS beginning status: in Dock, but not currently active in memory.
If I right-click on a file>Open With>PS, PS displays the "no open document!" message. Of course there is no open document; PS is not running.
The exclamation mark makes the message seem to indicate an error condition has occurred. Or at the very least, PS is telling me something I already know.
The message is a nuisance. PS should just open; perhaps the warning message should be, "data in buffer - continue to New Document dialog?"
A related question: PSCC2017's New command has become much slower than in previous versions, especially when attempting to paste from the buffer, on the order of 5+ seconds before the New Document dialog appears.
Also, in previous versions of PS, when I pressed Command+N, a new blank document sized to match the copied file's dimensions would be ready to accept the data (Command-V). I could chain the commands, as if Type-Ahead was enabled; Command+N+Command+V.
In 2017.0.1, when pressing Command+N, the New Document dialog opens, with a blue border around a document type called 'Clipboard." An additional step is required to import from the clipboard -- Return -or- click the Create Button, followed by Control-V. However, Type-Ahead is not enabled; one has to wait until after the Return or Create before the Command-V is detected and data brought in from the buffer.