Stderr output

<core_client_version>8.2.4</core_client_version>
<![CDATA[
<message>
M��ritt�m�t�n virhe.
 (0x80004005) - exit code 2147500037 (0x80004005)</message>
<stderr_txt>
2025-07-23 19:47:56 (4320): vboxwrapper version 26210
2025-07-23 19:47:56 (4320): BOINC client version: 8.2.4
2025-07-23 19:47:56 (4320): Detected: VirtualBox VboxManage Interface (Version: 7.0.6)
2025-07-23 19:47:57 (4320): Detected: Heartbeat check (file: 'heartbeat' every 1800.000000 seconds)
2025-07-23 19:47:57 (4320): Successfully copied 'init_data.xml' to the shared directory.
2025-07-23 19:47:57 (4320): Successfully copied 'input' to the shared directory.
2025-07-23 19:47:57 (4320): Create VM. (boinc_5dbe387c8e2ffc6e, slot#4)
2025-07-23 19:47:57 (4320): Setting Memory Size for VM. (630MB)
2025-07-23 19:47:58 (4320): Setting CPU Count for VM. (1)
2025-07-23 19:47:58 (4320): Setting Chipset Options for VM.
2025-07-23 19:47:58 (4320): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2025-07-23 19:47:58 (4320): Setting Boot Options for VM.
2025-07-23 19:47:59 (4320): Setting Network Configuration for NAT. (Driver: virtio)
2025-07-23 19:47:59 (4320): Enabling VM Network Access.
2025-07-23 19:48:00 (4320): Disabling USB Support for VM.
2025-07-23 19:48:00 (4320): Disabling COM Port Support for VM.
2025-07-23 19:48:00 (4320): Disabling LPT Port Support for VM.
2025-07-23 19:48:00 (4320): Disabling Audio Support for VM.
2025-07-23 19:48:01 (4320): Disabling Clipboard Support for VM.
2025-07-23 19:48:01 (4320): Disabling Drag and Drop Support for VM.
2025-07-23 19:48:01 (4320): Adding storage controller(s) to VM.
2025-07-23 19:48:01 (4320): Adding virtual disk drive to VM. (Theory_2025_07_03_prod.vdi)
2025-07-23 19:48:04 (4320): Adding VirtualBox Guest Additions to VM.
2025-07-23 19:48:04 (4320): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2025-07-23 19:48:04 (4320): forwarding host port 50158 to guest port 80
2025-07-23 19:48:04 (4320): Enabling remote desktop for VM.
2025-07-23 19:48:05 (4320): Required extension pack not installed, remote desktop not enabled.
2025-07-23 19:48:05 (4320): Enabling shared directory for VM.
2025-07-23 19:48:05 (4320): Starting VM using VBoxManage interface. (boinc_5dbe387c8e2ffc6e, slot#4)
2025-07-23 19:48:08 (4320): Error in start VM for VM: -2147467259
Command:
VBoxManage -q startvm "boinc_5dbe387c8e2ffc6e" --type headless
Output:
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_5dbe387c8e2ffc6e" to power on...

2025-07-23 19:48:08 (4320): VM failed to start.
2025-07-23 19:48:08 (4320): Could not start 
2025-07-23 19:48:08 (4320): ERROR: VM failed to start
2025-07-23 19:48:08 (4320): Powering off VM.
2025-07-23 19:48:08 (4320): Deregistering VM. (boinc_5dbe387c8e2ffc6e, slot#4)
2025-07-23 19:48:08 (4320): Removing network bandwidth throttle group from VM.
2025-07-23 19:48:09 (4320): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:29.006250          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:29.010016          Launched VM: 3163693968 pid: 28568 (0x6f98) frontend: headless name: boinc_256eb6fa7db5ad9e
00:00:31.124655          Saving settings file "C:\ProgramData\BOINC\slots\4\boinc_5dbe387c8e2ffc6e\boinc_5dbe387c8e2ffc6e.vbox" with version "1.19-windows"
00:00:31.127651          Finished saving settings file "C:\ProgramData\BOINC\slots\4\boinc_5dbe387c8e2ffc6e\boinc_5dbe387c8e2ffc6e.vbox"
00:00:31.167003          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.167024          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.168249          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:31.200466          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.200487          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.465641          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.465667          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.465947          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.465959          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.466045          Saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:31.468787          Finished saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml"
00:00:31.468847          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.468861          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.468992          Saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox" with version "1.19-windows"
00:00:31.471371          Finished saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox"
00:00:31.471998 DeleteVM ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.472026 DeleteVM ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:31.472226 DeleteVM Saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox" with version "1.19-windows"
00:00:31.474683 DeleteVM Finished saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox"
00:00:32.233073          Saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox" with version "1.19-windows"
00:00:32.235886          Finished saving settings file "C:\ProgramData\BOINC\slots\3\boinc_256eb6fa7db5ad9e\boinc_256eb6fa7db5ad9e.vbox"
00:00:32.275056          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.275086          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.276293          ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:32.310968          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.310994          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.577035          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.577057          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.577278          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.577289          ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={300763af-5d6b-46e6-aa96-273eac15538a} aComponent={MachineWrap} aText={The object functionality is limited}, preserve=false aResultDetail=0
00:00:32.577374          Saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:32.580147          Finished saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml"
00:00:32.580272          Saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:32.582707          Finished saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml"
00:00:32.583402 DeleteVM Saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml" with version "1.12-windows"
00:00:32.585775 DeleteVM Finished saving settings file "C:\Users\map\.VirtualBox\VirtualBox.xml"
00:00:33.019004 USBPROXY usbLibGetDevices: Starting USB device enumeration
00:00:33.020678 USBPROXY Getting USB descriptor (id 0) failed (dwErr=31) on hub USB#ROOT_HUB30#5&19b4ed14&0&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8} port 9
00:00:33.037320 USBPROXY Getting USB descriptor (id 3) failed (dwErr=31) on hub USB#ROOT_HUB30#5&19b4ed14&0&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8} port 11
00:00:33.050159 USBPROXY usbLibGetDevices: Found 5 USB devices, 0 captured
00:00:37.595193 main     VirtualBox: object deletion starts
00:00:37.595910 main     HostDnsMonitor: shutting down ...
00:00:37.595932 main     HostDnsMonitor: shut down
00:00:37.597130 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
00:00:37.597309 main     VirtualBox: object deleted

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

address=""
teleporterpassword=""
tracing-enabled="off"
tracing-allow-vm-access="off"
tracing-config=""
autostart-enabled="off"
autostart-delay=0
defaultfrontend=""
vmprocpriority="default"
natnet1="nat"
macaddress1="080027F84333"
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\\4\\boinc_5dbe387c8e2ffc6e\\boinc_5dbe387c8e2ffc6e-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_2922-4887428-112_0"
GuestMemoryBalloon=0

2025-07-23 19:47:59 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on 
Exit Code: 0
Output:

2025-07-23 19:48:00 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --cable-connected1 on 
Exit Code: 0
Output:

2025-07-23 19:48:00 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --usb off 
Exit Code: 0
Output:

2025-07-23 19:48:00 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --uart1 off --uart2 off 
Exit Code: 0
Output:

2025-07-23 19:48:00 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --lpt1 off --lpt2 off 
Exit Code: 0
Output:

2025-07-23 19:48:01 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --audio-enabled off 
Exit Code: 0
Output:

2025-07-23 19:48:01 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --clipboard disabled 
Exit Code: 0
Output:

2025-07-23 19:48:01 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --draganddrop disabled 
Exit Code: 0
Output:

2025-07-23 19:48:01 (4320): 
Command: VBoxManage -q storagectl "boinc_5dbe387c8e2ffc6e" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2025-07-23 19:48:02 (4320): 
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

2025-07-23 19:48:02 (4320): 
Command: VBoxManage -q storageattach "boinc_5dbe387c8e2ffc6e" --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: -2135228409
Output:
VBoxManage.exe: error: Cannot attach medium 'C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_07_03_prod.vdi': the media type 'MultiAttach' can only be attached to machines that were created with VirtualBox 4.0 or later
VBoxManage.exe: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component SessionMachine, interface IMachine, callee IUnknown
VBoxManage.exe: error: Context: "AttachDevice(Bstr(pszCtl).raw(), port, device, DeviceType_HardDisk, pMedium2Mount)" at line 785 of file VBoxManageStorageController.cpp

2025-07-23 19:48:02 (4320): 
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

2025-07-23 19:48:02 (4320): 
Command: VBoxManage -q closemedium disk "C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_07_03_prod.vdi" 
Exit Code: 0
Output:

2025-07-23 19:48:03 (4320): 
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:           normal (base)
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

2025-07-23 19:48:03 (4320): 
Command: VBoxManage -q storageattach "boinc_5dbe387c8e2ffc6e" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_07_03_prod.vdi" 
Exit Code: 0
Output:

2025-07-23 19:48:03 (4320): 
Command: VBoxManage -q storageattach "boinc_5dbe387c8e2ffc6e" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2025-07-23 19:48:04 (4320): 
Command: VBoxManage -q storageattach "boinc_5dbe387c8e2ffc6e" --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:

2025-07-23 19:48:04 (4320): 
Command: VBoxManage -q storageattach "boinc_5dbe387c8e2ffc6e" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2025-07-23 19:48:04 (4320): 
Command: VBoxManage -q bandwidthctl "boinc_5dbe387c8e2ffc6e" add "boinc_5dbe387c8e2ffc6e_net" --type network --limit 1024G 
Exit Code: 0
Output:

2025-07-23 19:48:04 (4320): 
Command: VBoxManage -q modifyvm "boinc_5dbe387c8e2ffc6e" --natpf1 ",tcp,127.0.0.1,50158,,80" 
Exit Code: 0
Output:

2025-07-23 19:48:05 (4320): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2025-07-23 19:48:05 (4320): 
Command: VBoxManage -q sharedfolder add "boinc_5dbe387c8e2ffc6e" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\4/shared"
Exit Code: 0
Output:

2025-07-23 19:48:08 (4320): 
Command: VBoxManage -q startvm "boinc_5dbe387c8e2ffc6e" --type headless
Exit Code: -2147467259
Output:
VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE).
VBoxManage.exe: error: AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED)
VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole
Waiting for VM "boinc_5dbe387c8e2ffc6e" to power on...

2025-07-23 19:48:08 (4320): 
Command: VBoxManage -q snapshot "boinc_5dbe387c8e2ffc6e" list 
Exit Code: -108
Output:
This machine does not have any snapshots

2025-07-23 19:48:09 (4320): 
Command: VBoxManage -q bandwidthctl "boinc_5dbe387c8e2ffc6e" remove "boinc_5dbe387c8e2ffc6e_net" 
Exit Code: 0
Output:
VBoxManage.exe: error: Bandwidth groups cannot be deleted while the VM is running

2025-07-23 19:48:09 (4320): 
Command: VBoxManage -q unregistervm "boinc_5dbe387c8e2ffc6e" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2025-07-23 19:48:15 (4320): called boinc_finish(-2147467259)

</stderr_txt>
]]>

©2025 CERN