I am having this problem too.  No external editors open using Photo>Edit In.  I'm on OS 10.7.3.

By the way, there is another thread here on this topic:

http://forums.adobe.com/thread/971432?tstart=0

Do you have ACR 6.7RC installed from labs.adobe.com?

and that's a RC...so not an official release...meaning HUGE fail from adobe.

I installed 6.7RC and the edit-in works now...though still prompts for 7.0 (what it did before i installed).  flag issue still occuring.    

I installed ACR 6.7RC and verified that Photoshop is using it (CS5.1). However, I still cannot get Lightroom 4 to open images in Photoshop. The "Edit In" function does not work. This is on a Windows 7 64-bit machine. Any other ideas?

Alan

PhotoCitizen.com

My problem is slightly different. When I hit cmd E (Mac) to edit in PSCS5 it opens a file that has none of the corrections I made in LR on the RAW file. The workaround is to export the file to a  temp folder on my desktop , edit and resave to  the original folder.

It seems to me that, if you have the ACR 6.7 installed on Photoshop and choose edit in Photoshop, open anyway, the file will open with the Lr changes baked in, just the same as if you had exported to a .tif and then opened in Ps. Save the file in Ps as a .psd and it will pop up in Lr.

Works for me until the new version of Photoshop comes along.

I did a test of this possibility - severely underexposed the file in lightroom and opened it in photoshop with "open anyway". I got the underexposed version and so have decided that the lightroom adjustments are present in the file, newly opened in Photoshop. When I'm finished with the Photoshop work I save as a psd and the file pops up in Lr with my adjustments intact.

Same Problem with my Imac.  Runing Lion 10.7.3 and I have updated all the NIK plugins.  When attempting to edit in:  the software does nothing, not even a blip.   I created a new user account on my computer and tried to add Photoshop Elements 10 as the external editor and that failed as well.   Tried several other editors with no results.

I suspect they have turned off the Edit in feature during the last phase of development and someone forgot to turn it back on.   My conclusions are that it is a problem with Lightroom 4 and not the third party addons as it will not even launch Elements 10, an Adobe product.  I did not remove Lightroom 3 so will continue to use it as I have only converted one catalog.

Hope they get a fix out in the next day or two.

I wish that the update to ACR 6.7RC for Photoshop had solved the problem, but it didn't. Has anyone had any success fixing this problem?

Adobe support is swamped - you can't even do an online chat right now. I hope a lot of people are complaining about this issue so it gets fixed.

Alan

PhotoCitizen.com

I wonder if there is any chance that a member of the Adobe team will respond here to let us know that they are listening?  It's very frustrating to get no reaction at all.  I also reported this by following the link for bug reporting but haven't had any response there either.  For anyone interested in adding to that, here is the thread:

http://feedback.photoshop.com/photoshop_family/topics/lr4_external_edi tor_failure

This is the solution. Windows 7, Lr4, PsCs5, ACR 6.7, using 2012 controls

Upgrade to ACR 6.7. It is on Adobe Labs.

Edit in Lr4 and right-click and choose "Edit in Photoshop", choose "Open Anyway"

Your file with your Lr adjustments will open in Photoshop with the Lr adjustments that you just made baked in.

Do your Photoshop edits and save as a .psd file.

The file with both your Lr edits and your Photoshop edits will pop up in your Lr catalogue with all your edits intact.

The only thing you can not do is to perform more edits on your raw file while in Photoshop. You will have to wait for ACR 7 to do so. No big deal.

Jeff Schewe told me that all your Lr edits will survive the trip to Photoshop if you are using ACR 6.7. You won't lose anything.

I am using a Canon camera. It is possible that other sorts of RAW files don't work, but I haven't seen anyone mention that.

Kate, I appreciate the idea but I have upgraded to 6.7, I am using Canon but the problem still exists.

The file opens but it is exactly in the state that I imported it. None of my corrections have been applied. Saving back into LR displays the file as the PSD or TIFF was in PS. That is uncorrected except for my edits in PS.

What I am doing is exporting to a folder and THEN opening in PS. The corrections made in LR will hold if you export but not if you open via PS and ACR.

I am using the "edit in function" in LR.

IOW I press command E in LR and The file is then opened in PS but without any corrections.

When I first used the command it warned me about the ACR issue. I clicked the box that says "don't show again". But I also noticed the option for "render through Lightroom". Well.... why doesn't it render through LR anyway and THEN open in PS? The bug seems to be with ACR and LR not passing on the XMP data.

I'm having the same problem with Pixelmator. You could edit in Pixelmator in ver 3 and the LR 4 beta but not in the LR 4 release. Exporting to any program appears to be working. I'm on Mac OS 10.7.3. Anyone have a solution?

Temporary solution for Mac Lion users and Lightroom 4.  I found a mention of this solution on another site last night and have tried it out on a Lion 10.7.3 installation and it works!  (With one caveat)

Download and install the Trial version of Photoshop CS5 and Install it.  (You do not have to start the program, just let the installer finish and quit.  Try your Lightroom 4 program and the Edit in feature should work.

On my Imac the first time I run Lightroom after a restart I have access to all three edit in options, Edit a copy with Lightroom Adjustments, Edit a copy and Edit original.   After that first run the only option that works is the Edit a copy with Lightroom Adjustments.

This has restored access to my Elements 10 and Nik software,  I am now going to reinstall Topaz Fusion and see if it works.

Hope this helps some of you.  It is still not the solution we want.

I'm in exactly the same situation (on Mac Lion system). I have PSE9 and downloaded and installed the trial version of PSE10 but "Edit In" still did not work. I happen to have Viveza and CEP4 licences for Photoshop, so until a fix is distributed, the only feasible workaround there is, is to export an image and then load it in separately to PSE9 from which I can then access Viveza or CEP4. Save back out, and then synchronise my LR4 folder (or import back in separately).

A pain in the bum but at least it gets me moving on.

I do wish, however, that Adobe would make some sort of announcement and acknowledgement of the problem to put us at some sort of ease!