Stderr output

<core_client_version>8.0.2</core_client_version>
<![CDATA[
<message>
Onjuiste functie.
 (0x1) - exit code 1 (0x1)</message>
<stderr_txt>
2025-07-27 21:12:46 (1668): vboxwrapper version 26210
2025-07-27 21:12:46 (1668): BOINC client version: 8.0.2
2025-07-27 21:12:47 (1668): Detected: VirtualBox VboxManage Interface (Version: 7.0.6)
2025-07-27 21:12:47 (1668): Detected: Heartbeat check (file: 'heartbeat' every 1800.000000 seconds)
2025-07-27 21:12:47 (1668): Successfully copied 'init_data.xml' to the shared directory.
2025-07-27 21:12:47 (1668): Successfully copied 'input' to the shared directory.
2025-07-27 21:12:48 (1668): Create VM. (boinc_cfa59e99b8691b21, slot#5)
2025-07-27 21:12:48 (1668): Setting Memory Size for VM. (630MB)
2025-07-27 21:12:48 (1668): Setting CPU Count for VM. (1)
2025-07-27 21:12:49 (1668): Setting Chipset Options for VM.
2025-07-27 21:12:49 (1668): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2025-07-27 21:12:49 (1668): Setting Boot Options for VM.
2025-07-27 21:12:50 (1668): Setting Network Configuration for NAT. (Driver: virtio)
2025-07-27 21:12:50 (1668): Enabling VM Network Access.
2025-07-27 21:12:50 (1668): Disabling USB Support for VM.
2025-07-27 21:12:50 (1668): Disabling COM Port Support for VM.
2025-07-27 21:12:51 (1668): Disabling LPT Port Support for VM.
2025-07-27 21:12:51 (1668): Disabling Audio Support for VM.
2025-07-27 21:12:51 (1668): Disabling Clipboard Support for VM.
2025-07-27 21:12:51 (1668): Disabling Drag and Drop Support for VM.
2025-07-27 21:12:52 (1668): Adding storage controller(s) to VM.
2025-07-27 21:12:52 (1668): Adding virtual disk drive to VM. (Theory_2025_07_03_prod.vdi)
2025-07-27 21:12:55 (1668): Attempts: 3
2025-07-27 21:12:55 (1668): Adding VirtualBox Guest Additions to VM.
2025-07-27 21:12:56 (1668): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-07-27 21:12:56 (1668): forwarding host port 50100 to guest port 80
2025-07-27 21:12:56 (1668): Enabling remote desktop for VM.
2025-07-27 21:12:57 (1668): Required extension pack not installed, remote desktop not enabled.
2025-07-27 21:12:57 (1668): Enabling shared directory for VM.
2025-07-27 21:12:57 (1668): Starting VM using VBoxManage interface. (boinc_cfa59e99b8691b21, slot#5)
2025-07-27 21:12:58 (1668): Error in start VM for VM: 1
Command:
VBoxManage -q startvm "boinc_cfa59e99b8691b21" --type headless
Output:
VBoxManage.exe: error: The virtual machine 'boinc_cfa59e99b8691b21' has terminated unexpectedly during startup with exit code 1 (0x1).  More details may be available in 'C:\ProgramData\BOINC\slots\5\boinc_cfa59e99b8691b21\Logs\VBoxHardening.log'
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component MachineWrap, interface IMachine
Waiting for VM "boinc_cfa59e99b8691b21" to power on...

2025-07-27 21:12:58 (1668): VM failed to start.
2025-07-27 21:12:58 (1668): Could not start 
2025-07-27 21:12:58 (1668): ERROR: VM failed to start
2025-07-27 21:12:58 (1668): Powering off VM.
2025-07-27 21:12:58 (1668): Deregistering VM. (boinc_cfa59e99b8691b21, slot#5)
2025-07-27 21:12:59 (1668): Removing network bandwidth throttle group from VM.
2025-07-27 21:13:02 (1668): Attempts: 2
2025-07-27 21:13:02 (1668): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:20.678963          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.678974          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.678985          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.678993          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679001          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679009          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679017          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679025          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679033          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679041          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679049          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679057          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679066          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679074          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679082          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679090          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679098          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679106          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679114          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679122          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679132          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679141          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679150          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679158          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679166          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679174          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679182          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679190          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679198          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679206          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679214          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679222          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:20.679394          Saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:20.684654          Finished saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml"
00:00:20.684888          Saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:20.690183          Finished saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml"
00:00:20.691209 DeleteVM Saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:20.698036 DeleteVM Finished saving settings file "C:\Users\Administrator\.VirtualBox\VirtualBox.xml"
00:00:25.713793 main     VirtualBox: object deletion starts
00:00:25.716844 main     HostDnsMonitor: shutting down ...
00:00:25.716891 main     HostDnsMonitor: shut down
00:00:25.717452 Watcher  ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={7682d5eb-f00e-44f1-8ca2-99d08b1cd607} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0
00:00:25.717690 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

ered.
UUID: fa7bae0e-28db-48b6-95d6-25052489e129
Settings file: 'C:\ProgramData\BOINC\slots\5\boinc_cfa59e99b8691b21\boinc_cfa59e99b8691b21.vbox'

2025-07-27 21:12:48 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --description "Theory_2922-4895264-114_1" 
Exit Code: 0
Output:

2025-07-27 21:12:48 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --memory 630 
Exit Code: 0
Output:

2025-07-27 21:12:49 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --cpus 1 
Exit Code: 0
Output:

2025-07-27 21:12:49 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --acpi on --ioapic on --rtcuseutc off 
Exit Code: 0
Output:

2025-07-27 21:12:49 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --vram 16 --graphicscontroller VBoxVGA 
Exit Code: 0
Output:

2025-07-27 21:12:49 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --boot1 disk --boot2 dvd --boot3 none --boot4 none 
Exit Code: 0
Output:

2025-07-27 21:12:50 (1668): 
Command: VBoxManage -q showvminfo "boinc_cfa59e99b8691b21" --machinereadable 
Exit Code: 0
Output:
name="boinc_cfa59e99b8691b21"
Encryption:     disabled
groups="/"
ostype="Linux 2.6 / 3.x / 4.x / 5.x (64-bit)"
UUID="fa7bae0e-28db-48b6-95d6-25052489e129"
CfgFile="C:\\ProgramData\\BOINC\\slots\\5\\boinc_cfa59e99b8691b21\\boinc_cfa59e99b8691b21.vbox"
SnapFldr="C:\\ProgramData\\BOINC\\slots\\5\\boinc_cfa59e99b8691b21\\Snapshots"
LogFldr="C:\\ProgramData\\BOINC\\slots\\5\\boinc_cfa59e99b8691b21\\Logs"
hardwareuuid="fa7bae0e-28db-48b6-95d6-25052489e129"
memory=630
pagefusion="off"
vram=16
cpuexecutioncap=100
hpet="off"
cpu-profile="host"
chipset="piix3"
firmware="BIOS"
cpus=1
pae="on"
longmode="on"
triplefaultreset="off"
apic="on"
x2apic="on"
nested-hw-virt="off"
cpuid-portability-level=0
bootmenu="messageandmenu"
boot1="disk"
boot2="dvd"
boot3="none"
boot4="none"
acpi="on"
ioapic="on"
biosapic="apic"
biossystemtimeoffset=0
BIOS NVRAM File="C:\\ProgramData\\BOINC\\slots\\5\\boinc_cfa59e99b8691b21\\boinc_cfa59e99b8691b21.nvram"
rtcuseutc="off"
hwvirtex="on"
nestedpaging="on"
largepages="on"
vtxvpid="on"
vtxux="on"
virtvmsavevmload="on"
iommu="none"
paravirtprovider="default"
effparavirtprovider="kvm"
VMState="poweroff"
VMStateChangeTime="2025-07-27T19:12:48.058000000"
graphicscontroller="vboxvga"
monitorcount=1
accelerate3d="off"
accelerate2dvideo="off"
teleporterenabled="off"
teleporterport=0
teleporteraddress=""
teleporterpassword=""
tracing-enabled="off"
tracing-allow-vm-access="off"
tracing-config=""
autostart-enabled="off"
autostart-delay=0
defaultfrontend=""
vmprocpriority="default"
natnet1="nat"
macaddress1="08002788C668"
cableconnected1="on"
nic1="nat"
nictype1="82540EM"
nicspeed1="0"
mtu="0"
sockSnd="64"
sockRcv="64"
tcpWndSnd="64"
tcpWndRcv="64"
nic2="none"
nic3="none"
nic4="none"
nic5="none"
nic6="none"
nic7="none"
nic8="none"
hidpointing="ps2mouse"
hidkeyboard="ps2kbd"
uart1="off"
uart2="off"
uart3="off"
uart4="off"
lpt1="off"
lpt2="off"
audio="default"
audio_out="off"
audio_in="off"
clipboard="disabled"
draganddrop="disabled"
vrde="off"
usb="off"
ehci="off"
xhci="off"
recording_enabled="off"
recording_screens=1
 rec_screen0
rec_screen_enabled="on"
rec_screen_id=0
rec_screen_video_enabled="on"
rec_screen_audio_enabled="off"
rec_screen_dest="File"
rec_screen_dest_filename="C:\\ProgramData\\BOINC\\slots\\5\\boinc_cfa59e99b8691b21\\boinc_cfa59e99b8691b21-screen0.webm"
rec_screen_opts="vc_enabled=true,ac_enabled=false,ac_profile=med"
rec_screen_video_res_xy="1024x768"
rec_screen_video_rate_kbps=512
rec_screen_video_fps=25
description="Theory_2922-4895264-114_1"
GuestMemoryBalloon=0

2025-07-27 21:12:50 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on 
Exit Code: 0
Output:

2025-07-27 21:12:50 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --cable-connected1 on 
Exit Code: 0
Output:

2025-07-27 21:12:50 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --usb off 
Exit Code: 0
Output:

2025-07-27 21:12:51 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-07-27 21:12:51 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-07-27 21:12:51 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --audio-enabled off 
Exit Code: 0
Output:

2025-07-27 21:12:51 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --clipboard disabled 
Exit Code: 0
Output:

2025-07-27 21:12:52 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --draganddrop disabled 
Exit Code: 0
Output:

2025-07-27 21:12:52 (1668): 
Command: VBoxManage -q storagectl "boinc_cfa59e99b8691b21" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-07-27 21:12:55 (1668): 
Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_07_03_prod.vdi" 
Exit Code: 0
Output:
UUID:           93ef7340-8636-46d8-8751-a7cb0c80413d
Parent UUID:    base
State:          created
Type:           multiattach
Location:       C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_07_03_prod.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       10240 MBytes
Size on disk:   2847 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576
Child UUIDs:    f21c007a-026f-4348-bb6a-b4b13d7a2d02
                c0458f24-8f63-476e-8279-ed41ea146093
                741215be-2462-402d-8664-46c98f816c10
                f8d917ae-f244-4040-a326-41108dcab7e7

2025-07-27 21:12:55 (1668): 
Command: VBoxManage -q storageattach "boinc_cfa59e99b8691b21" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_07_03_prod.vdi" 
Exit Code: 0
Output:

2025-07-27 21:12:56 (1668): 
Command: VBoxManage -q storageattach "boinc_cfa59e99b8691b21" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-07-27 21:12:56 (1668): 
Command: VBoxManage -q bandwidthctl "boinc_cfa59e99b8691b21" add "boinc_cfa59e99b8691b21_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-07-27 21:12:56 (1668): 
Command: VBoxManage -q modifyvm "boinc_cfa59e99b8691b21" --natpf1 ",tcp,127.0.0.1,50100,,80" 
Exit Code: 0
Output:

2025-07-27 21:12:57 (1668): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2025-07-27 21:12:57 (1668): 
Command: VBoxManage -q sharedfolder add "boinc_cfa59e99b8691b21" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\5/shared"
Exit Code: 0
Output:

2025-07-27 21:12:58 (1668): 
Command: VBoxManage -q startvm "boinc_cfa59e99b8691b21" --type headless
Exit Code: 1
Output:
VBoxManage.exe: error: The virtual machine 'boinc_cfa59e99b8691b21' has terminated unexpectedly during startup with exit code 1 (0x1).  More details may be available in 'C:\ProgramData\BOINC\slots\5\boinc_cfa59e99b8691b21\Logs\VBoxHardening.log'
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component MachineWrap, interface IMachine
Waiting for VM "boinc_cfa59e99b8691b21" to power on...

2025-07-27 21:12:59 (1668): 
Command: VBoxManage -q snapshot "boinc_cfa59e99b8691b21" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-07-27 21:12:59 (1668): 
Command: VBoxManage -q bandwidthctl "boinc_cfa59e99b8691b21" remove "boinc_cfa59e99b8691b21_net" 
Exit Code: 0
Output:

2025-07-27 21:13:02 (1668): 
Command: VBoxManage -q unregistervm "boinc_cfa59e99b8691b21" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-07-27 21:13:10 (1668): called boinc_finish(1)

</stderr_txt>
]]>

©2025 CERN