I can't think of any reason that should be happening, so try resetting Preferences - Hold down Shift Ctrl Alt (Shift Cmd Opt) as you open Photoshop.
When Photomerge doesn't work, you can sometimes get round it by loading the images into Photoshop layers (Bridge > Tools > Photoshop has a function to do this).
When the layers are open, select them all and go Edit > Auto Align layers, followed by Edit > Auto Merge layers (with seamless tones and colours checked).
This problem has expanded to all of the “Automate” menu. Contact sheet 11 in Bridge states “Fatal error - this may not be usable in this version”
In Photoshop all is well until the folder is chosen then : “No Images available” I have tried resetting preferences, uninstalling and re-installing, manually removing everything in the (users) Library that includes “Photoshop CS6" or "Bridge CS6” and installing the original program from original disk. I am still at this point - no scripting seems to work, but most other features appear to operate as designed. I have no projects on the go right now, but this might cost me unless it can be resolved. As a note I have PS CS6 v13.0.5 and Bridge on my laptop and that program works as it should.
(a very frustrated) Mark Strang
I'm assuming you HAVE actually tried saving the documents (e.g., as PSD files) before doing the Photomerge?
If you are on Mac, do you have a font manager installed? I've heard certain ones of those will touch your file for some reason after you've saved it.
Do you know that you don't actually have to have any files open for Photomerge to work? Try File - Automate - Photomerge, then choose the files to stitch.
Yes, I have saved files in .psd, .tiff, jpg and dng formats. I have done all the prescribed “fixes”- replace preferences; uninstall and install and update, manually everything related to preferences and application support in library and (users) library, etc. I also have a copy of PS CS6 ver. 13.0.5 on my laptop that does work as it should. I have used Photoshop since 3.5 and this is the first glitch that I cannot fix. I am frustrated to the point of doing something drastic.