Name | Theory_2922-4859346-303_0 |
Workunit | 235672024 |
Created | 8 Oct 2025, 22:21:13 UTC |
Sent | 9 Oct 2025, 7:06:29 UTC |
Report deadline | 20 Oct 2025, 7:06:29 UTC |
Received | 9 Oct 2025, 7:20:30 UTC |
Server state | Over |
Outcome | Computation error |
Client state | Compute error |
Exit status | -2147467259 (0x80004005) Unknown error code |
Computer ID | 10879249 |
Run time | 25 sec |
CPU time | |
Validate state | Invalid |
Credit | 0.00 |
Device peak FLOPS | 4.05 GFLOPS |
Application version | Theory Simulation v301.00 (vbox64_theory) windows_x86_64 |
Peak working set size | 11.70 MB |
Peak swap size | 6.27 MB |
Peak disk usage | 3.49 MB |
<core_client_version>8.2.4</core_client_version> <![CDATA[ <message> Unspecified error (0x80004005) - exit code 2147500037 (0x80004005)</message> <stderr_txt> 2025-10-09 03:06:58 (21956): vboxwrapper version 26210 2025-10-09 03:06:58 (21956): BOINC client version: 8.2.4 2025-10-09 03:06:59 (21956): Detected: VirtualBox VboxManage Interface (Version: 7.2.2) 2025-10-09 03:07:00 (21956): Detected: Heartbeat check (file: 'heartbeat' every 1800.000000 seconds) 2025-10-09 03:07:00 (21956): Successfully copied 'init_data.xml' to the shared directory. 2025-10-09 03:07:00 (21956): Successfully copied 'input' to the shared directory. 2025-10-09 03:07:00 (21956): Create VM. (boinc_2a874add3c9d96e0, slot#16) 2025-10-09 03:07:00 (21956): Setting Memory Size for VM. (1024MB) 2025-10-09 03:07:01 (21956): Setting CPU Count for VM. (1) 2025-10-09 03:07:01 (21956): Setting Chipset Options for VM. 2025-10-09 03:07:01 (21956): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB) 2025-10-09 03:07:02 (21956): Setting Boot Options for VM. 2025-10-09 03:07:02 (21956): Setting Network Configuration for NAT. (Driver: virtio) 2025-10-09 03:07:03 (21956): Enabling VM Network Access. 2025-10-09 03:07:03 (21956): Disabling USB Support for VM. 2025-10-09 03:07:03 (21956): Disabling COM Port Support for VM. 2025-10-09 03:07:04 (21956): Disabling LPT Port Support for VM. 2025-10-09 03:07:04 (21956): Disabling Audio Support for VM. 2025-10-09 03:07:04 (21956): Disabling Clipboard Support for VM. 2025-10-09 03:07:04 (21956): Disabling Drag and Drop Support for VM. 2025-10-09 03:07:05 (21956): Adding storage controller(s) to VM. 2025-10-09 03:07:05 (21956): Adding virtual disk drive to VM. (Theory_2025_08_13_prod.vdi) 2025-10-09 03:07:08 (21956): Adding VirtualBox Guest Additions to VM. 2025-10-09 03:07:08 (21956): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB) 2025-10-09 03:07:08 (21956): forwarding host port 55573 to guest port 80 2025-10-09 03:07:09 (21956): Enabling remote desktop for VM. 2025-10-09 03:07:09 (21956): Required extension pack not installed, remote desktop not enabled. 2025-10-09 03:07:09 (21956): Enabling shared directory for VM. 2025-10-09 03:07:10 (21956): Starting VM using VBoxManage interface. (boinc_2a874add3c9d96e0, slot#16) 2025-10-09 03:07:15 (21956): Error in start VM for VM: -2147467259 Command: VBoxManage -q startvm "boinc_2a874add3c9d96e0" --type headless Output: VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE). VBoxManage.exe: error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED) VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole Waiting for VM "boinc_2a874add3c9d96e0" to power on... 2025-10-09 03:07:15 (21956): VM failed to start. 2025-10-09 03:07:15 (21956): Could not start 2025-10-09 03:07:15 (21956): ERROR: VM failed to start 2025-10-09 03:07:15 (21956): Powering off VM. 2025-10-09 03:07:15 (21956): Deregistering VM. (boinc_2a874add3c9d96e0, slot#16) 2025-10-09 03:07:15 (21956): Removing network bandwidth throttle group from VM. 2025-10-09 03:07:16 (21956): Removing VM from VirtualBox. Hypervisor System Log: 00:00:08.299747 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:08.584587 Platform architecture set to 'x86' 00:00:08.587572 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:08.592428 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:08.878024 Platform architecture set to 'x86' 00:00:08.880566 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:08.881545 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:08.885646 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:08.885918 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 0 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:08.888601 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:08.892838 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:08.893580 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:08.898481 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:09.186807 Platform architecture set to 'x86' 00:00:09.189156 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:09.191309 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 1 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:09.191498 Saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" with version "1.12-windows" 00:00:09.194809 Finished saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" 00:00:09.195157 Saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" with version "1.12-windows" 00:00:09.198177 Finished saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" 00:00:09.198605 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:09.201936 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:09.491486 Platform architecture set to 'x86' 00:00:09.493318 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:09.497420 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:09.794673 Platform architecture set to 'x86' 00:00:09.797081 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:09.800672 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:10.450345 Platform architecture set to 'x86' 00:00:10.452038 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:10.456525 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:10.777772 Platform architecture set to 'x86' 00:00:10.780167 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={2ce10519-3c09-45d8-a12d-e887786146b7} aComponent={VirtualBoxWrap} aText={Ńo extension pack providing a cryptographic support module could be found}, preserve=false aResultDetail=0 00:00:10.788291 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:10.788399 ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={No storage device attached to device slot 0 on port 2 of controller 'Hard Disk Controller'}, preserve=false aResultDetail=0 00:00:10.798638 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={83cfdc66-4f20-4569-ad39-8722f7d472b3} aComponent={RecordingSettingsWrap} aText={Recording not started}, preserve=false aResultDetail=0 00:00:10.800642 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0 00:00:11.083214 Launched VM: 2893445280 pid: 22180 (0x56a4) frontend: headless name: boinc_2a874add3c9d96e0 00:00:15.190042 Platform architecture set to 'x86' 00:00:16.477510 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:16.482526 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:16.643380 Platform architecture set to 'x86' 00:00:16.644655 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0 00:00:16.781328 Platform architecture set to 'x86' 00:00:16.783446 Saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" with version "1.19-windows" 00:00:16.787724 Finished saving settings file "C:\ProgramData\BOINC\slots\16\boinc_2a874add3c9d96e0\boinc_2a874add3c9d96e0.vbox" 00:00:17.111143 Saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" with version "1.12-windows" 00:00:17.116297 Finished saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" 00:00:17.116392 Saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" with version "1.12-windows" 00:00:17.119397 Finished saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" 00:00:17.120478 DeleteVM Saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" with version "1.12-windows" 00:00:17.125663 DeleteVM Finished saving settings file "C:\Users\Default.W7-I7-920\.VirtualBox\VirtualBox.xml" 00:00:22.133736 main VirtualBox: object deletion starts 00:00:22.134916 main HostDnsMonitor: shutting down ... 00:00:22.134945 main HostDnsMonitor: shut down 00:00:22.136741 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={2ce10519-3c09-45d8-a12d-e887786146b7} aComponent={VirtualBoxWrap} aText={The object is not ready}, preserve=false aResultDetail=0 00:00:22.136961 main VirtualBox: object deleted VM Execution Log: VM Startup Log: VM Trace Log: ng-enabled="off" tracing-allow-vm-access="off" tracing-config="" autostart-enabled="off" autostart-delay=0 defaultfrontend="" vmprocpriority="default" natnet1="nat" macaddress1="0800279F0F94" cableconnected1="on" nic1="nat" nictype1="82540EM" nicspeed1="0" mtu="0" sockSnd="64" sockRcv="64" tcpWndSnd="64" tcpWndRcv="64" localhostReachable="0" forwardBroadcast="0" enableTFTP="0" 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" clipboard_file_transfers="off" draganddrop="disabled" vrde="off" usb="off" ehci="off" xhci="off" recording_started="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\\16\\boinc_2a874add3c9d96e0\\boinc_2a874add3c9d96e0-screen0.webm" rec_screen_opts="ac_profile=med" rec_screen_video_res_xy="1024x768" rec_screen_video_rate_kbps=512 rec_screen_video_fps=25 description="Theory_2922-4859346-303_0" GuestMemoryBalloon=0 2025-10-09 03:07:03 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on Exit Code: 0 Output: 2025-10-09 03:07:03 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --cable-connected1 on Exit Code: 0 Output: 2025-10-09 03:07:03 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --usb off Exit Code: 0 Output: 2025-10-09 03:07:04 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --uart1 off --uart2 off Exit Code: 0 Output: 2025-10-09 03:07:04 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --lpt1 off --lpt2 off Exit Code: 0 Output: 2025-10-09 03:07:04 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --audio-enabled off Exit Code: 0 Output: 2025-10-09 03:07:04 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --clipboard disabled Exit Code: 0 Output: 2025-10-09 03:07:05 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --draganddrop disabled Exit Code: 0 Output: 2025-10-09 03:07:05 (21956): Command: VBoxManage -q storagectl "boinc_2a874add3c9d96e0" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3 Exit Code: 0 Output: 2025-10-09 03:07:05 (21956): Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: UUID: 045b03b5-74fd-4f58-8f68-0eee86fe796d Parent UUID: base State: created Type: multiattach Location: C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_08_13_prod.vdi Storage format: VDI Format variant: dynamic default Capacity: 10240 MBytes Size on disk: 2847 MBytes Encryption: disabled Property: AllocationBlockSize=1048576 2025-10-09 03:07:06 (21956): Command: VBoxManage -q storageattach "boinc_2a874add3c9d96e0" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: -2135228409 Output: VBoxManage.exe: error: Cannot attach medium 'C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_08_13_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 786 of file VBoxManageStorageController.cpp 2025-10-09 03:07:06 (21956): Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: UUID: 045b03b5-74fd-4f58-8f68-0eee86fe796d Parent UUID: base State: created Type: multiattach Location: C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_08_13_prod.vdi Storage format: VDI Format variant: dynamic default Capacity: 10240 MBytes Size on disk: 2847 MBytes Encryption: disabled Property: AllocationBlockSize=1048576 2025-10-09 03:07:06 (21956): Command: VBoxManage -q closemedium disk "C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: 2025-10-09 03:07:07 (21956): Command: VBoxManage -q showhdinfo "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: UUID: 045b03b5-74fd-4f58-8f68-0eee86fe796d Parent UUID: base State: created Type: normal (base) Location: C:\ProgramData\BOINC\projects\lhcathome.cern.ch_lhcathome\Theory_2025_08_13_prod.vdi Storage format: VDI Format variant: dynamic default Capacity: 10240 MBytes Size on disk: 2847 MBytes Encryption: disabled Property: AllocationBlockSize=1048576 2025-10-09 03:07:07 (21956): Command: VBoxManage -q storageattach "boinc_2a874add3c9d96e0" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: 2025-10-09 03:07:07 (21956): Command: VBoxManage -q storageattach "boinc_2a874add3c9d96e0" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none Exit Code: 0 Output: 2025-10-09 03:07:08 (21956): Command: VBoxManage -q storageattach "boinc_2a874add3c9d96e0" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "C:\ProgramData\BOINC/projects/lhcathome.cern.ch_lhcathome/Theory_2025_08_13_prod.vdi" Exit Code: 0 Output: 2025-10-09 03:07:08 (21956): Command: VBoxManage -q storageattach "boinc_2a874add3c9d96e0" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "C:\Program Files\Oracle\VirtualBox/VBoxGuestAdditions.iso" Exit Code: 0 Output: 2025-10-09 03:07:08 (21956): Command: VBoxManage -q bandwidthctl "boinc_2a874add3c9d96e0" add "boinc_2a874add3c9d96e0_net" --type network --limit 1024G Exit Code: 0 Output: 2025-10-09 03:07:09 (21956): Command: VBoxManage -q modifyvm "boinc_2a874add3c9d96e0" --natpf1 ",tcp,127.0.0.1,55573,,80" Exit Code: 0 Output: 2025-10-09 03:07:09 (21956): Command: VBoxManage -q list extpacks Exit Code: 0 Output: Extension Packs: 0 2025-10-09 03:07:09 (21956): Command: VBoxManage -q sharedfolder add "boinc_2a874add3c9d96e0" --name "shared" --hostpath "C:\ProgramData\BOINC\slots\16/shared" Exit Code: 0 Output: 2025-10-09 03:07:15 (21956): Command: VBoxManage -q startvm "boinc_2a874add3c9d96e0" --type headless Exit Code: -2147467259 Output: VBoxManage.exe: error: Not in a hypervisor partition (HVP=0) (VERR_NEM_NOT_AVAILABLE). VBoxManage.exe: error: VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED) VBoxManage.exe: error: Details: code E_FAIL (0x80004005), component ConsoleWrap, interface IConsole Waiting for VM "boinc_2a874add3c9d96e0" to power on... 2025-10-09 03:07:15 (21956): Command: VBoxManage -q snapshot "boinc_2a874add3c9d96e0" list Exit Code: -108 Output: This machine does not have any snapshots 2025-10-09 03:07:16 (21956): Command: VBoxManage -q bandwidthctl "boinc_2a874add3c9d96e0" remove "boinc_2a874add3c9d96e0_net" Exit Code: 0 Output: 2025-10-09 03:07:16 (21956): Command: VBoxManage -q unregistervm "boinc_2a874add3c9d96e0" --delete Exit Code: 0 Output: 0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100% 2025-10-09 03:07:21 (21956): called boinc_finish(-2147467259) </stderr_txt> ]]>
©2025 CERN