Program.Main: ERROR: BUILD FAILED: Failed while running Cook for C:\Users\Documents\Unreal Projects\Arch_3dRT2 4.8\Arch_3dRT.uproject; see log C:\Users\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Unreal+Engine+4.8\Cook.txt
Can you provide it those logs? Possibly root of the problem is above as error you give is only error that cook script failed. Also it’s x86 and x86-64 
or just call them 32-bit and 64-bit
hi i use to get this error again i could build one week ago, and now i have probleme to build on any platform here it is Windows platform i tryed everything developpement, shipping, on x64, x32 and always get Automation tools error
here is the part of log :
does it come from about that i have too much texture on my project ? my main map is about 400 mo ! and texture in memory about 700 mo ! maybe it come from this ?
Help maybe ?