I am getting it too, as well as extremely long compile times. I have to compile 3-4 times before I can get a successful compile.
Log is:
Info Total build time: 86.70 seconds (Local executor: 0.00 seconds)
Info Compiling game modules for hot reload
Info Performing 7 actions (4 in parallel)
Info Tank.cpp
Info TankAIController.cpp
Info TankAimingComponent.cpp
Info TankPlayerController.cpp
Info c1xx: error C3859: virtual memory range for PCH exceeded; please recompile with a command line option of '-Zm111' or greater
Info c1xx: fatal error C1076: compiler limit: internal heap limit reached; use /Zm to specify a higher limit
Info c1xx: error C3859: virtual memory range for PCH exceeded; please recompile with a command line option of '-Zm111' or greater
Info c1xx: fatal error C1076: compiler limit: internal heap limit reached; use /Zm to specify a higher limit
Info c1xx: error C3859: virtual memory range for PCH exceeded; please recompile with a command line option of '-Zm111' or greater
Info c1xx: fatal error C1076: compiler limit: internal heap limit reached; use /Zm to specify a higher limit
Info BattleTank.generated.cpp
Info c1xx: error C3859: virtual memory range for PCH exceeded; please recompile with a command line option of '-Zm111' or greater
Info c1xx: fatal error C1076: compiler limit: internal heap limit reached; use /Zm to specify a higher limit
Info ERROR: UBT ERROR: Failed to produce item: C:\Users\\Documents\Repos\BattleTank\Binaries\Win64\UE4Editor-BattleTank-379.dll