photoshop cs3 file error message

[davidreints]

I am running CS3, and frequently get the following error message:

'Could not complete your request because it is not a valid Photoshop document'

and cannot open certain files.

They are photoshop files, created in Photoshop, and only used in Photoshop, and I am unable to open them - I am losing huge amounts of work and time

 

[KmH]

What are the files types involved?
If the files are corrupted you may be SOL.

 

[jasiahbrady]

Try opening your Photoshop file in Illustrator (choosing "Convert Photoshop Layers to Objects…").

This works with CS but I don't remember if this worked with earlier versions.


Also problem might be in preferences.


Photoshop sometimes gets stuck because of a corrupt preferences file.


1. While holding down all three Ctrl+Alt+Shift buttons open Photoshop or a file that opens with Photoshop

2. You should get a prompt asking if you want to "delete the Photoshop settings file".

3. Click Yes.


This will reset the preferences file.


And some useful reference as adding assist.... Photoshop Repair Toolbox

 

[Dave442]

Are the files coming from someone using a newer version of Photoshop. If coming from someone with a newer version it is best if they keep the "Maximize PSD file compatibility" check box filled when saving the file.