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Failed to open descriptor file! - Make sure VS is compiled for shipping


after successful packing i can´t start the builded myproject.exe!

I only get the error message :

"Failed to open descriptor file ´../../../Myproject-Win64-Shipping/Myproject-Win64-Shipping.uproject´ "

i tried to package and cook again but the same problem

Product Version: UE 4.8
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asked Jul 04 '15 at 08:28 PM in Packaging & Deployment

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avatar image Xennon Jul 05 '15 at 10:03 AM

I have the exact same problem. No matter what project I try to build, it always gives that same error. I can only run the game via "Launch" in the editor, but no matter what I do, I can't build a stand alone build. I'm using windows 7 x64 and building a win32 package.

Also - as a side note, how do you exit the game once it's launched? Is there some mystical key-combo that exits or do I have to somehow add this functionality to my projects?

avatar image Roman Gorislavski Jul 05 '15 at 03:56 PM

Have you tried Esc on keyboard if in viewport. If stand alone then Alt+F4.

avatar image Xennon Jul 05 '15 at 05:00 PM

Alt-F4 doesn't work for me. I managed to add an input action to quit game when player presses Esc or Alt-X. It doesn't appear that any built-in hot key is used for exiting the game which seems odd to me. Fortunately adding one was not hard.

avatar image MoonwareGames Jul 05 '15 at 05:24 PM

In stand alone u have to put a own key function to close. I had the same problem and have put it with a menu and the ESC key to close the Stand alone

avatar image Roman Gorislavski Jul 05 '15 at 03:51 PM

I have same problem on Windows 8 x64 Temporary solution is to change built from shipping to development. Hope this will get real fix soon.

avatar image MoonwareGames Jul 05 '15 at 05:02 PM

So its a bug of the engine ? Because of this i can use Dev instead of Shipping until it fixed . If not i hope for a solution

avatar image Xennon Jul 05 '15 at 05:05 PM

Yes, I noticed that also. Development build seems to work fine but shipping build always fails with that descriptor file error. I'm not sure what the differences are between dev and ship - maybe shipping is more compact. In any case, choosing a different build shouldn't break the build if nothing else is changed.

avatar image MoonwareGames Jul 05 '15 at 05:17 PM

No shipping is like a finish game. it make it able for works on and with Steam for example. But u are right. It s only the kind of rendering and building and this cant make it possible or impossible to work

avatar image wittlief ♦♦ STAFF Jul 09 '15 at 04:16 PM

Hi AVARSStudios,

I noticed that you marked this issue with the crash tag, does your packaged project actually crash and bring up the crash reporter, or does it just stop working with the descriptor error?

If the former, can you see if you have crash logs in your project's saved folder and attach to this thread as a txt file?

If you don't experience a crash, can you post your project's successful build logs, along with your packaging process?


avatar image MoonwareGames Jul 12 '15 at 06:17 PM

I haven´t experience some crash files.link text

package.txt (3.4 MB)
avatar image MoonwareGames Jul 12 '15 at 06:23 PM

alt text

settings.png (30.8 kB)
avatar image wittlief ♦♦ STAFF Jul 14 '15 at 04:47 PM

For process I mean more like how do you package, from the editor or from the Project Launcher? Do you use the command line? Are you using binary or source from Github?

avatar image MoonwareGames Jul 19 '15 at 06:30 PM

For normally i open my project editor and package there always (with file->packaging project) and i look with the outputlog always the process and the faults and errors while the packaging works.

All in all i use source from Github. I hope this is more useful than before.

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Ok, have you built Win64 UE4Game with the Shipping configuration in Visual Studio?

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answered Jul 20 '15 at 07:52 PM

avatar image MoonwareGames Jul 20 '15 at 07:59 PM

What u mean exactly? i have build with standard config of the editor

avatar image wittlief ♦♦ STAFF Jul 23 '15 at 08:58 PM

Hi AVARSStudios,

Are you still unable to package for shipping?

avatar image fdslk Aug 25 '15 at 04:06 AM

I'm having this problem with the launcher version of the engine (4.8.3)

avatar image Samantha Sutton ♦♦ STAFF Aug 26 '15 at 03:30 PM


In order to better assist you, could you please post a new question to AnswerHub and upload a .txt file of your errors from packaging and also any additional information you may have regarding this error?

Thank you!

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