This is the log:
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2015.02.28-08.01.47:047][ 0]LogCookCommandlet:Display: Cooking /Game/Elemental/Environment/Lava_Assets/Materials/M_LavaFlow_01 → C:/Doom2RemakeUE47/Saved/Cooked/WindowsNoEditor/Doom2Remake/Content/Elemental/Environment/Lava_Assets/Materials/M_LavaFlow_01.uasset
MainFrameActions: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 557.0868635s to run UE4Editor-Cmd.exe, ExitCode=3
MainFrameActions: Packaging (Windows (64-bit)): Project.Cook: Cook failed. Deleting cooked data.
MainFrameActions: Packaging (Windows (64-bit)): ErrorReporter.Error: ERROR: AutomationTool error: Cook failed.
MainFrameActions: Packaging (Windows (64-bit)): BuildCommand.Execute: ERROR: BUILD FAILED
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception:
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: Exception in AutomationScripts.Automation: BUILD FAILED: Failed while running Cook for C:\Doom2RemakeUE47\Doom2Remake.uproject; see log G:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Programs\AutomationT
MainFrameActions: Packaging (Windows (64-bit)): ool\Saved\Logs\Cook.txt
MainFrameActions: Packaging (Windows (64-bit)): Stacktrace: at Project.Cook(ProjectParams Params) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Scripts\CookCommand.Automation.cs:line 171
MainFrameActions: Packaging (Windows (64-bit)): at BuildCookRun.DoBuildCookRun(ProjectParams Params) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Scripts\BuildCookRun.Automation.cs:line 252
MainFrameActions: Packaging (Windows (64-bit)): at BuildCommand.Execute() in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\BuildCommand.cs:line 37
MainFrameActions: Packaging (Windows (64-bit)): at AutomationTool.Automation.Execute(List1 CommandsToExecute, CaselessDictionary
1 Commands) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Automation.cs:line 380
MainFrameActions: Packaging (Windows (64-bit)): at AutomationTool.Automation.Process(String[] CommandLine) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Automation.cs:line 352
MainFrameActions: Packaging (Windows (64-bit)): at AutomationTool.Program.MainProc(Object Param) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Program.cs:line 168
MainFrameActions: Packaging (Windows (64-bit)): at AutomationTool.InternalUtils.RunSingleInstance(MainProc Main, Object Param) in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Utils.cs:line 705
MainFrameActions: Packaging (Windows (64-bit)): at AutomationTool.Program.Main() in g:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Source\Programs\AutomationTool\Program.cs:line 115
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: ERROR: BUILD FAILED: Failed while running Cook for C:\Doom2RemakeUE47\Doom2Remake.uproject; see log G:\Downloads_2014\UnrealEngine-4.7.0-release\UnrealEngine-4.7.0-release\Engine\Programs\AutomationTool\Saved\Logs\Cook.txt
MainFrameActions: Packaging (Windows (64-bit)): ProcessManager.KillAll: Trying to kill 0 spawned processes.
MainFrameActions: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=25
MainFrameActions: Packaging (Windows (64-bit)): Domain_ProcessExit
MainFrameActions: Packaging (Windows (64-bit)): ProcessManager.KillAll: Trying to kill 0 spawned processes.
MainFrameActions: Packaging (Windows (64-bit)): AutomationToolLauncher exiting with ExitCode=25
MainFrameActions: Packaging (Windows (64-bit)): copying UAT log files…
MainFrameActions: Packaging (Windows (64-bit)): RunUAT.bat ERROR: AutomationTool was unable to run successfully.
MainFrameActions: Packaging (Windows (64-bit)): BUILD FAILED
Any idea what could be wrong ?