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DSim Cloud fails to start session: cannot connect to app.metricsvcloud.com:443

Hi everyone,

I am trying to run a CORE-V-VERIF simulation for a CV32E40X-based SoC using DSim Cloud. The test is a custom firmware benchmark called crypto_raw_perm_bench.

The command is launched from the CORE-V-VERIF UVM simulation flow. The simulation does not reach RTL compilation. It fails immediately when DSim tries to open a new cloud/usage session.

The error log is:

Copyright (C) 2017-2025 Altair Engineering Inc. All rights reserved.
=N:[UsageMeter (2026-06-28 22:22:56 +0700)] Using SSL_CERT_DIR=/usr/lib/ssl/certs SSL_CERT_FILE=/usr/lib/ssl/cert.pem as location of CA certificates to verify license server.
=W:[UsageMeter (2026-06-28 22:22:57 +0700)] Not retryable
=E:[UsageMeter (2026-06-28 22:22:57 +0700)] Failed to connect to app.metricsvcloud.com:443. 8007D02854710000:error:10080002:BIO routines:BIO_lookup_ex:system lib:crypto/bio/bio_addr.c:758:Name or service not known

=W:[UsageMeter (2026-06-28 22:22:57 +0700)] cannot communicate with usage server for opening new session, num session retries left:2
=W:[UsageMeter (2026-06-28 22:23:07 +0700)] Not retryable
=E:[UsageMeter (2026-06-28 22:23:07 +0700)] Failed to connect to app.metricsvcloud.com:443. 8007D02854710000:error:10080002:BIO routines:BIO_lookup_ex:system lib:crypto/bio/bio_addr.c:758:Name or service not known

=W:[UsageMeter (2026-06-28 22:23:07 +0700)] cannot communicate with usage server for opening new session, num session retries left:1
=W:[UsageMeter (2026-06-28 22:23:17 +0700)] Not retryable
=E:[UsageMeter (2026-06-28 22:23:17 +0700)] Failed to connect to app.metricsvcloud.com:443. 8007D02854710000:error:10080002:BIO routines:BIO_lookup_ex:system lib:crypto/bio/bio_addr.c:758:Name or service not known

=F:[UsageMeter (2026-06-28 22:23:17 +0700)] retries exhausted, exiting
make: *** [/home/lu/workspace/core-v-verif/mk/uvmt/dsim.mk:129: comp] Error 101
No DSim log found to archive: dsim_results/default/crypto_raw_perm_bench/0/dsim-crypto_raw_perm_bench.log

My understanding is that this is not an RTL or UVM compilation error, because no DSim simulation log is generated. It looks like the DSim Cloud client or usage meter cannot resolve or connect to app.metricsvcloud.com:443.

Environment:

OS: Linux
Project: CORE-V-VERIF / CV32E40X UVM flow
Simulator: DSim Cloud
Test: crypto_raw_perm_bench
Failing makefile step: core-v-verif/mk/uvmt/dsim.mk:129, target comp
Network: please advise whether proxy/DNS/firewall configuration is required

Could anyone confirm the following?

Is app.metricsvcloud.com:443 the correct endpoint required by DSim Cloud for opening a session?
Does this error indicate a DNS/proxy/firewall issue on the local machine?
Are there any required environment variables for DSim Cloud when running behind a proxy, such as HTTP_PROXY or HTTPS_PROXY?
Is there a way to test DSim Cloud connectivity before launching the CORE-V-VERIF make flow?
If the DSim Cloud portal is accessible from a browser but the CLI fails, what should be checked first?

I would appreciate any guidance on how to configure the Linux environment correctly for DSim Cloud connectivity.

Thanks!

Newjeansneverdie

1

HV SETS automation for HyperView TCL/HWC scripting.

My point of reference is for Nastran Bulks and OP2.
Situation For example if you have defined a Element set "set_cs" in the case control section in the master bulk with an ID =6.
Once the model and results are loaded in the HyperView, you'll see first 5 sets automatically created.
#Name Type ID



0D Set Components 1

1D Set Components 2

2D set Components 3

3D Set Components 4

Orphan Nodes Components 5

set_cs Elements 6

but if you try to create a new Element set in the HV GUI, it will create a Element set set_user with ID : 6
set_user Element 6

Task : To automate post-processing for results for multiple sets, subcases, result types etc.
Since sets are not unique by the ID. There can exist 2 sets sharing same ID of same element type.
if someone is trying to automate set selection based on SET ID of same type (element) to populate any linked property like Set Label.

Action : The pool Identifier has to be added on top of the ID while creating a handle for set.

	
hwi GetSessionHandle sess

sess GetProjectHandle prj 
prj GetPageHandle pg [prj GetActivePage] 
pg GetWindowHandle win [pg GetActiveWindow]

win GetClientHandle cliH 
cliH GetModelHandle mod [cliH GetActiveModel]

set CaseControlSets [mod GetSelectionSetList SETS_ID_POOL]
foreach id $CaseControlSets{
  set hN Cset${id} 
          mod GetSelectionSetHandle $hN "SETS_ID_POOL $id"
if {[$hN GetType] eq "element" && [$hN GetLabel] ne ""} {
  puts "$id [$hN GetLabel] Cset"
}
$hN ReleaseHandle 
}
set UserSets [mod  GetSelectionSetList User_Set]
foreach id $UserSets {
  set hN Uset${id} 
  


      mod GetSelectionSetHandle $hN "User_Set $id"
if {[$hN GetType] eq "element" && [$hN GetLabel] ne ""} {
  puts "$id [$hN GetLabel] Uset"
}
$hN ReleaseHandle
}

Results : Correctly gives the labels based on ID and Pool Type, Now you can use this info for further manipulation.

Cheers

Abin_Alex

1

Re: How can I renew Student Edition License?

Hi @Jacob_at_Altair

Your account is now verified, and you should now be able to see the student edition bundle. If you still face issues, let us know here with the first 5 digits of your license.

Thanks!

Ankita_v

1

Mindlin SHELL transverse shear problem

Hi everyone 👋,

I have been working on a model lately, and I think I have encountered a problem concerning the Mindlin shell formulation of CQUAD4 elements:

I noticed that on every SHELL elements of my model, the transverse shear value are null, both of them, like if I was doing a thin-shell formulation (cf picture 1&2 enclosed).

After checking the PSHELL card on my fem file, I can only confirm that from ALTAIR help my shells should have been calculated with the Mindlin formulation, and I should have transverse shear (MID1, 2 and 3 refer to the appropriate material).

Furthermore, I can find the element forces in the ZX direction, from which the transversal shear should be calculated if I am understanding that correctly (cf picture 3).

It looks like the transverse shear, ie term ZX and XY of the stress tensor in the case of this shell, is not output after the analysis. This results in a wrong VonMises stress.

Does anyone knows if I am doing something wrong ? I am also including the PSHELL card of the propertie of the shell (picture 4). I have realised a simple linear static analysis, using the Optistruct 2026 solver.

Thank you all for your future answers,

Roman

1

2

3

4

Roman_j

1

Re: Unable to Get H3D while the Model is running

Hi ,

You can do it in two ways.

Define NLMON which will give you filename_nl.h3d and you can review the intermediate result when the job is still running.
Defile PARAM,IMPLOUT, YES. This will generate another file named as _impl.h3d which contains incremental results of nonlinear implicit (static and transient) analysis.

Thanks

Rajashri

Rajashri_Saha

1

Re: TCL for HyperView customization for visualization for 1D elements Rods/BEAMS

Hello @Abin_Alex

can you try somehitng like this?

hwi GetSessionHandle ses
ses GetClientManagerHandle mgr animation
mgr GetRenderOptionsHandle rend
rend SetElementMarkEnabled true
rend SetElementMarkShape 1D dot
rend SetElementMarkShape mass cylinder
rend SetElementMarkSize 0.5

Regards,
Sebastian

Sebastian_Karp

1

Re: Motionsolve Case 7022: Several Questions

Hello @Jin1,

Close all the applications and you'd need to define the following environment variables
HW_MV_EXPERIMENTAL = OSFLEX

If it's not working in your case, then I'd recommend creating in User variables instead of System variables.

Reopen the Motionview application, and you should see the OS Flex Body option under flex as follows:

Hope this helps!

Vishvam

1

Re: Student License "Error activating license:This lic. was already activated using different HostIDs"

Hi,

Your previous license key activation is now deactivated in Altair one, you can now reactivate the student license with the same license key.

Deactivation and reactivation feature is only if a computer breaks down or reformatted and is only allowed a few times per user preprogrammed into the system.

You can deactivate the license from one machine and reactivate in another by yourself if you have access to both machines as per –
https://community.altair.com/discussion/34280/altair-student-edition-deactivate-from-one-computer-to-activate-in-another-in-the-rare-case-a-computer-is-lost-or-malfunctional#latest

Thanks

Ankita_v

1

Re: Request to reset student license activation – already activated error after reinstall

@Francesco_Signorini

Your previous license key activation is now deactivated in Altair one, you can now reactivate the student license with the same license key.

Deactivation and reactivation feature is only if a computer breaks down or reformatted and is only allowed a few times per user preprogrammed into the system.

You can deactivate the license from one machine and reactivate in another by yourself if you have access to both machines as per –
https://community.altair.com/discussion/34280/altair-student-edition-deactivate-from-one-computer-to-activate-in-another-in-the-rare-case-a-computer-is-lost-or-malfunctional#latest

Thanks

Ankita_v

1

Re: PSIM Student License Renewal Issue

Hi,

To use student edition pls see - https://community.altair.com/discussion/34207/instructions-to-access-the-free-altair-student-edition-now-in-altair-one#latest

To Renew your Altair one Student Edition License Key once it expires, please follow these instructions -

https://community.altair.com/discussion/61846/how-to-renew-your-altair-one-student-edition-license-key-once-it-expires

If you are using a university-managed license, as per -

https://community.altair.com/discussion/61871/using-the-academic-edition-licensed-with-altair-units-via-altair-one-altair-managed-licensing

you need to reach out to your faculty administrator to have it renewed.

Thanks

Ankita_v

1