Stderr output

<core_client_version>8.2.8</core_client_version>
<![CDATA[
<message>
process exited with code 18 (0x12, -238)</message>
<stderr_txt>
2026-03-07 21:39:45 (47061): vboxwrapper version 26210
2026-03-07 21:39:45 (47061): BOINC client version: 8.2.8
2026-03-07 21:39:45 (47061): Detected: VirtualBox VboxManage Interface (Version: 7.2.4)
2026-03-07 21:39:45 (47061): Detected: Sandbox Configuration Enabled
2026-03-07 21:39:45 (47061): Successfully copied 'init_data.xml' to the shared directory.
2026-03-07 21:39:45 (47061): Create VM. (boinc_432d3ffe6df3c02d, slot#0)
2026-03-07 21:39:45 (47061): Setting Memory Size for VM. (4800MB)
2026-03-07 21:39:45 (47061): Setting CPU Count for VM. (8)
2026-03-07 21:39:46 (47061): Setting Chipset Options for VM.
2026-03-07 21:39:46 (47061): Setting Graphics Controller Options for VM. (Driver: VBoxVGA, 16MB)
2026-03-07 21:39:46 (47061): Setting Boot Options for VM.
2026-03-07 21:39:46 (47061): Setting Network Configuration for NAT. (Driver: virtio)
2026-03-07 21:39:46 (47061): Enabling VM Network Access.
2026-03-07 21:39:46 (47061): Disabling USB Support for VM.
2026-03-07 21:39:46 (47061): Disabling COM Port Support for VM.
2026-03-07 21:39:46 (47061): Disabling Audio Support for VM.
2026-03-07 21:39:46 (47061): Disabling Clipboard Support for VM.
2026-03-07 21:39:46 (47061): Disabling Drag and Drop Support for VM.
2026-03-07 21:39:46 (47061): Adding storage controller(s) to VM.
2026-03-07 21:39:46 (47061): Adding virtual disk drive to VM. (ATLAS_vbox_3.03_image.vdi)
2026-03-07 21:39:46 (47061): Adding VirtualBox Guest Additions to VM.
2026-03-07 21:39:46 (47061): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2026-03-07 21:39:46 (47061): forwarding host port 57027 to guest port 80
2026-03-07 21:39:46 (47061): Enabling remote desktop for VM.
2026-03-07 21:39:46 (47061): Required extension pack not installed, remote desktop not enabled.
2026-03-07 21:39:46 (47061): Enabling shared directory for VM.
2026-03-07 21:39:46 (47061): Starting VM using VBoxManage interface. (boinc_432d3ffe6df3c02d, slot#0)
2026-03-07 21:39:46 (47061): Error in start VM for VM: -2135228398
Command:
VBoxManage -q startvm "boinc_432d3ffe6df3c02d" --type headless
Output:
VBoxManage: error: Cannot run the machine because its platform architecture x86 is not supported on ARM
VBoxManage: error: Details: code VBOX_E_PLATFORM_ARCH_NOT_SUPPORTED (0x80bb0012), component MachineWrap, interface IMachine, callee nsISupports
VBoxManage: error: Context: "LaunchVMProcess(a->session, sessionType.raw(), ComSafeArrayAsInParam(aBstrEnv), progress.asOutParam())" at line 921 of file VBoxManageMisc.cpp

2026-03-07 21:39:46 (47061): VM failed to start.
2026-03-07 21:39:46 (47061): Could not start 
2026-03-07 21:39:46 (47061): ERROR: VM failed to start
2026-03-07 21:39:46 (47061): Powering off VM.
2026-03-07 21:39:46 (47061): Deregistering VM. (boinc_432d3ffe6df3c02d, slot#0)
2026-03-07 21:39:46 (47061): Removing network bandwidth throttle group from VM.
2026-03-07 21:39:46 (47061): Removing VM from VirtualBox.

    Hypervisor System Log:

00:00:00.554093 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.554589 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.574197 DCon03   Platform architecture set to 'x86'
00:00:00.575785 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.576295 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.595791 DCon03   Platform architecture set to 'x86'
00:00:00.597006 DCon03   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
00:00:00.597346 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.597814 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.597904 DCon03   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
00:00:00.598417 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.598818 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.598996 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.599329 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.618688 DCon02   Platform architecture set to 'x86'
00:00:00.619944 DCon02   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
00:00:00.620444 DCon02   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
00:00:00.620600 DCon02   Saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml" with version "1.12-macosx"
00:00:00.621056 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml"
00:00:00.621166 DCon02   Saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml" with version "1.12-macosx"
00:00:00.621513 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml"
00:00:00.621670 DCon02   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.622048 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.641795 DCon03   Platform architecture set to 'x86'
00:00:00.642755 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.643231 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.663011 DCon03   Platform architecture set to 'x86'
00:00:00.664162 DCon03   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.664620 DCon03   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.702614 DCon03   Platform architecture set to 'x86'
00:00:00.703469 DCon02   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.703961 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.723414 DCon02   Platform architecture set to 'x86'
00:00:00.724723 DCon02   ERROR [COM]: aRC=VBOX_E_OBJECT_NOT_FOUND (0x80bb0001) aIID={2ce10519-3c09-45d8-a12d-e887786146b7} aComponent={VirtualBoxWrap} aText={&#197;&#131;o extension pack providing a cryptographic support module could be found}, preserve=false aResultDetail=0
00:00:00.731457 DCon02   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
00:00:00.731550 DCon02   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
00:00:00.737571 DCon02   ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={83cfdc66-4f20-4569-ad39-8722f7d472b3} aComponent={RecordingSettingsWrap} aText={Recording not started}, preserve=false aResultDetail=0
00:00:00.738707 DCon02   ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:00.758798 DCon02   ERROR [COM]: aRC=VBOX_E_PLATFORM_ARCH_NOT_SUPPORTED (0x80bb0012) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={MachineWrap} aText={Cannot run the machine because its platform architecture x86 is not supported on ARM}, preserve=false aResultDetail=0
00:00:00.778541 DCon02   Platform architecture set to 'x86'
00:00:00.779267 DCon02   ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={e36a5081-a82a-40bd-9e4e-42a44d6ce50f} aComponent={SessionMachine} aText={This machine does not have any snapshots}, preserve=false aResultDetail=0
00:00:00.798672 DCon02   Platform architecture set to 'x86'
00:00:00.799574 DCon02   Saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox" with version "1.19-macosx"
00:00:00.800113 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d.vbox"
00:00:00.819079 DCon02   Saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml" with version "1.12-macosx"
00:00:00.819540 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml"
00:00:00.819560 DCon02   Saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml" with version "1.12-macosx"
00:00:00.819888 DCon02   Finished saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml"
00:00:00.820219 DeleteVM Saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml" with version "1.12-macosx"
00:00:00.820575 DeleteVM Finished saving settings file "/Library/Application Support/BOINC Data/projects/VirtualBox/VirtualBox.xml"

    VM Execution Log:


    VM Startup Log:


    VM Trace Log:

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="080027C95F50"
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"
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="/Library/Application Support/BOINC Data/slots/0/boinc_432d3ffe6df3c02d/boinc_432d3ffe6df3c02d-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="AAwMDm2nEJ9nsSi4ap6QjLDmwznN0nGgGQJmIVkRDmrHXLDmAsocdn_1"
GuestMemoryBalloon=0

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --nic1 nat --nic-type1 "virtio" --cable-connected1 off --nat-dns-proxy1 on 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --cable-connected1 on 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --usb off 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --uart1 off --uart2 off 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --audio-enabled off 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --clipboard disabled 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --draganddrop disabled 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storagectl "boinc_432d3ffe6df3c02d" --name "Hard Disk Controller" --add "sata" --controller "IntelAHCI" --hostiocache off --portcount 3
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q showhdinfo "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           multiattach
Location:       /Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storageattach "boinc_432d3ffe6df3c02d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: -2135228409
Output:
VBoxManage: error: Cannot attach medium '/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi': the media type 'MultiAttach' can only be attached to machines that were created with VirtualBox 4.0 or later
VBoxManage: error: Details: code VBOX_E_INVALID_OBJECT_STATE (0x80bb0007), component SessionMachine, interface IMachine, callee nsISupports
VBoxManage: error: Context: "AttachDevice(Bstr(pszCtl).raw(), port, device, DeviceType_HardDisk, pMedium2Mount)" at line 786 of file VBoxManageStorageController.cpp

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q showhdinfo "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           multiattach
Location:       /Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q closemedium disk "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q showhdinfo "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:
UUID:           3e56213b-898f-4e83-899f-8eb541d45260
Parent UUID:    base
State:          created
Type:           normal (base)
Location:       /Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi
Storage format: VDI
Format variant: dynamic default
Capacity:       20480 MBytes
Size on disk:   4204 MBytes
Encryption:     disabled
Property:       AllocationBlockSize=1048576

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storageattach "boinc_432d3ffe6df3c02d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storageattach "boinc_432d3ffe6df3c02d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --medium none 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storageattach "boinc_432d3ffe6df3c02d" --storagectl "Hard Disk Controller" --port 0 --device 0 --type hdd --mtype multiattach --medium "/Library/Application Support/BOINC Data/projects/lhcathome.cern.ch_lhcathome/ATLAS_vbox_3.03_image.vdi" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q storageattach "boinc_432d3ffe6df3c02d" --storagectl "Hard Disk Controller" --port 1 --device 0 --type dvddrive --medium "/Applications/VirtualBox.app/Contents/MacOS/VBoxGuestAdditions.iso" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q bandwidthctl "boinc_432d3ffe6df3c02d" add "boinc_432d3ffe6df3c02d_net" --type network --limit 1024G 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q modifyvm "boinc_432d3ffe6df3c02d" --natpf1 ",tcp,127.0.0.1,57027,,80" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q list extpacks
Exit Code: 0
Output:
Extension Packs: 0

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q sharedfolder add "boinc_432d3ffe6df3c02d" --name "shared" --hostpath "/Library/Application Support/BOINC Data/slots/0/shared"
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q startvm "boinc_432d3ffe6df3c02d" --type headless
Exit Code: -2135228398
Output:
VBoxManage: error: Cannot run the machine because its platform architecture x86 is not supported on ARM
VBoxManage: error: Details: code VBOX_E_PLATFORM_ARCH_NOT_SUPPORTED (0x80bb0012), component MachineWrap, interface IMachine, callee nsISupports
VBoxManage: error: Context: "LaunchVMProcess(a->session, sessionType.raw(), ComSafeArrayAsInParam(aBstrEnv), progress.asOutParam())" at line 921 of file VBoxManageMisc.cpp

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q snapshot "boinc_432d3ffe6df3c02d" list 
Exit Code: 0
Output:
This machine does not have any snapshots

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q bandwidthctl "boinc_432d3ffe6df3c02d" remove "boinc_432d3ffe6df3c02d_net" 
Exit Code: 0
Output:

2026-03-07 21:39:46 (47061): 
Command: VBoxManage -q unregistervm "boinc_432d3ffe6df3c02d" --delete 
Exit Code: 0
Output:
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%

2026-03-07 21:39:51 (47061): called boinc_finish(-2135228398)

</stderr_txt>
]]>

©2026 CERN