Don't trust that Photoshop will always open a png file. I had the same problem and got the answer "file cannot be parsed". Save as psd file, I've never had a problem opening a psd file.
Thanks but when I screen grab automatically saved as PNG : (
Note that this is boilerplate text.
If you give complete and detailed information about your setup and the issue at hand,
such as your platform (Mac or Win),
exact versions of your OS, of Photoshop (not just "CS6", but something like CS6v.13.0.6) and of Bridge,
your settings in Photoshop > Preference > Performance
the type of file you were working on,
machine specs, such as total installed RAM, scratch file HDs, total available HD space, video card specs, including total VRAM installed,
what troubleshooting steps you have taken so far,
what error message(s) you receive,
if having issues opening raw files also the exact camera make and model that generated them,
if you're having printing issues, indicate the exact make and model of your printer, paper size, image dimensions in pixels (so many pixels wide by so many pixels high). if going through a RIP, specify that too.
someone may be able to help you (not necessarily this poster, who is not a Windows user).
a screen shot of your settings or of the image could be very helpful too.
Please read this FAQ for advice on how to ask your questions correctly for quicker and better answers:
What version of your OS and what version of Photoshop do you use? My screengrabs are png, but I use a Mac.
OSX 10.6 and Photoshop 8.0. Thanks
Did Photoshop used to open png screengrabs before? What error message does Photoshop give you now?
Can Preview open the screengrab?
Photoshop did previously. Preview still does...
Sent from my iPhone
Ok, go for an uninstall/reinstall of CS2 to fix any damaged plugins.
Preview can open PNG's . Photoshop error message reads 'Could not complete your request because it is not the right kind of document'
Well then something has gone wrong with CS2.
You can try and reset CS2: Hold down Ctrl-Alt-Shift, start Photoshop and you should see a delete settings dialog. Answer "yes", that may fix it.
Is this your original CS2 the one you installed from disk? The reason I ask is that Adobe has replaced it.
You will see a Photoshop CS2 for Windows and a new serial number. Uninstall your old CS2 and use the new installer. Activate it with the new serial number.
Let me know how it goes.