Can't open Quartz Composer on new updated OS 10.8.3

Thank you Frank, for answering.
Thank you too Ralph for your cooperation.

@ Frank: yes that is the link I used, which allows you to download the XCode Graphic Tools dmg package I mentioned.

In other words:

OS, XCode and Quartz Composer seem to be the latest versions of each.

Downloading XCode, then trying to open QC were the very 1st things I did after updating OS from 10.6.8 to 10.8.3.

With 10.8.3 (Mountain Lion), the downloaded XCode app (3,43 Go) was installed by Apple Store into the Applications folder, not into the Developer folder, as it was with 10.6.8 (Snow Leopard)

I tried then to open my primary 4.0 version of QC and got that mentioned Error message and thought: "Uh uh, that hasn't been automatically updated! 😕 "

So I made my Developer folder empty, and, on https://developer.apple.com/downloads/index.action, downloaded the latest XCode Graphic Tools folder (99,3 Mo): XCode Graphic Tools for XCode - January 2013

That is what I meant, writing:

> Then deleted all items from my Developer folder and downloaded new Quartz Composer app, through xcode46graphicstools6938140a.dmg and tried to open it.

Quartz Composer version is there: 4.6

I didn't found any information ("Read me"), about where to place it (Apps' or Dev' folder), however it seems that all apps open fine,

only not QC, with, again, that mentioned Error Message.

Thanks Frank, thanks Ralph,

OK. So, today:

- I removed from my computer anything named Xcode, Quartz Composer, Graphic Tools or xxx.qtz, emptied my Developer folder,

- I downloaded a new OS X Mountain Lion Update v10.8.3 (Combo) from support.apple.com/kb/DL1640 and installed it,

- I downloaded a new Xcode 4.6.1 from Apple Store to my Applications folder

- I downloaded a new Graphic Tools for Xcode - January, 13, from https://developer.apple.com/downloads/index.action# to my Applications folder,

On that brand new, updated and innocent configuration, I tried again to open Quartz Composer, and got that same ****** "Internal Error" message:

Not being a specialist, I suspect there would be here some conflict beetween Quartz Composer and OS 10.8.3.

I have seen here some other similar problems, such there: https://discussions.apple.com/thread/3202206?start=0&tstart=0

What is to be done?

Quartz Composer Internal Error

An exception was raised

+[QCImageManager registerImageBufferConverterClass:priority:]: "BackdropsImageBufferConverter" is already registered

0x8d905b2c: GFException

0x8d90895e: GFThrowException

0x8d88cb14: +[QCImageManager(ConverterRegistry) registerImageBufferConverterClass:priority:]

0x0839178f: mm_distance

0x8d88b870: -[GFNodeManager(PlugIns) loadPlugInAtPath:]

0x8d88b5ef: -[QCNodeManager loadPlugInAtPath:]

0x8d88bc28: -[GFNodeManager(PlugIns) loadPlugInsInFolder:withExtensions:]

0x8d88b9f5: -[GFNodeManager(PlugIns) loadPlugInsInLibrary:withExtensions:]

0x8d88a7c2: _RegisterPatches

0x8d888dd9: +[QCPatch(Registry) patchManager]

0x062e5a76

0x062e586a

0x062e5803

0x062e5653

0x92d83eda: _CFXNotificationPost

0x941c6e26: -[NSNotificationCenter postNotificationName:object:userInfo:]

0x8dde54d4: -[NSApplication finishLaunching]

0x8dde504a: -[NSApplication run]

0x062e5409

Frank Caggiano wrote:

Wasn't there an actual crash report?

I didn't see that, screen was as shown

Frank Caggiano wrote:

BTW in your first screen shot what happens if you press continue?

Yesterday: I belive that nothing (no answer to mouse call)

Just now: error message disappears, but impossibility to open a new file

Frank Caggiano wrote:

Open the Console app, search down the left hand side column until you come to the DiagnosticReports heading, open it and see if there are any crash reports from QC. If so copy and past the first 50 or so lines from it.

Is that what you mean?
// I answer your next message in a feww minutes

Parent Process: launchd [123]

Report Version: 10

Crashed Thread: 0

Exception Type: EXC_BREAKPOINT (SIGTRAP)

Exception Codes: 0x0000000000000002, 0x0000000000000000

Application Specific Information:

dyld: launch, loading dependent libraries

Dyld Error Message:

Library not loaded: @rpath/DevToolsKit.framework/Versions/A/DevToolsKit

Referenced from: /Users/USER/Desktop/*/Quartz Composer.app/Contents/MacOS/Quartz Composer

Reason: image not found

Binary Images:

Frank Caggiano wrote:

One other thing have you tried running QC from a new user account?

No, I have only one Administrator account

Frank Caggiano wrote:

Make a new user, log in as that user and run QC. Same problem?

I just opened a 2nd Administrator account and get the same Error message

Frank Caggiano wrote:

You have Xcode installed in the Applications folder?

This is were Apple Store put it

Frank Caggiano wrote:

The crash dump seems to be indicating that you are running version

Version:

4.0 (103.1)

That is the newest I could find on https://developer.apple.com/downloads/index.action#

Frank Caggiano wrote:

Where did you install the latest version of QC? How are you launching it?

I thought it was logical to install it near Xcode: in a "Graphic Tools" folder, in the Apps folder, rather than in the Developer folder (I can try that).

I launch here by double clicking on the QC app, or on its alias in the Dock.

Frank Caggiano wrote:

Find QC in the Finder and do a Get Info on it what version is reported

Frank Caggiano wrote:

/Users/USER/Desktop/*/Quartz Composer.app/Contents/MacOS/Quartz Composer

Is that a valid path on your system? Is there a /Users/USER folder? What's in it?

"Utilisateurs" is "Users", in French, "Bibliothèque" is your "Library", "Téléchargements" your "Downloads", "Partagé" your "Shared". Nothing visible here like "USER".

"Test" is the new User's name you asked me to... test and "Ztock" my perso stuff.