this document was not opened because it is not a valid photoshop document

[Zeppsin29039517yq9i]

A psd file that I finished and saved at my workplace today does not open now. It gives the error 'this document is not a valid photoshop document and could not be opened' and I need urgent help with an important file that cannot be repaired.

[kevin stohlmeyer]

Hi @Zeppsin29039517yq9i were there any issues saving the file? How much free HD space in the directory is available? Where was this saved? Locally or to a server, external source?

[CoryShubert]

Hi @Zeppsin29039517yq9i sorry to hear this.

Let's make sure we're in a default state and there are no stale settings somewhere: 

Restore your preferences using this manual method:  

https://helpx.adobe.com/photoshop/using/preferences.html#Manually  

Does it work correctly? 

If that doesn't solve it, you can quit Photoshop and put the Settings folder back. 

It may help if we could see your Photoshop System Info. Launch Photoshop, and select Help >System Info...and copy/paste the text in a reply.