--- title: Can’t access UNIX/Linux computer view in Administration pane SCOM 2012 description: If you can’t access the UNIX/Linux computers view in the Administration pane in Microsoft System Center 2012 R2 Operations Manager, read this guide. --- [![OpsLogix-1](https://www.opslogix.com/hs-fs/hubfs/OpsLogix-1.png?width=99&height=26&name=OpsLogix-1.png "OpsLogix-1")](https://www.opslogix.com/) [![Try for free](https://no-cache.hubspot.com/cta/default/4447944/48fc2f22-9c19-4da2-991d-982f39e5821b.png)](https://cta-redirect.hubspot.com/cta/redirect/4447944/48fc2f22-9c19-4da2-991d-982f39e5821b) [![Customer Portal  ](https://no-cache.hubspot.com/cta/default/4447944/a095bd0d-abee-4339-9fd9-7368523384e2.png)](https://cta-redirect.hubspot.com/cta/redirect/4447944/a095bd0d-abee-4339-9fd9-7368523384e2) ** ** ** #### Monitoring ■ Management Packs for Operations Manager and Azure Solutions #### Virtual Operator ■ Automation and integration products for Operations Manager #### Reporting & Analytics ■ Plan, measure and follow up on KPIs of your IT  Service delivery #### [Monitoring as a Service](https://www.opslogix.com/monitoring-as-a-service) *■ Managed SCOM Service* #### [Consultancy Services](https://www.opslogix.com/consultancy-services) *■ World-class consultancy services* Search **Menu** ** ** [![Try for free](https://no-cache.hubspot.com/cta/default/4447944/43473ed6-ccec-484f-b719-d0178c533e93.png)](https://cta-redirect.hubspot.com/cta/redirect/4447944/43473ed6-ccec-484f-b719-d0178c533e93) [![Customer Portal  ](https://no-cache.hubspot.com/cta/default/4447944/a095bd0d-abee-4339-9fd9-7368523384e2.png)](https://cta-redirect.hubspot.com/cta/redirect/4447944/a095bd0d-abee-4339-9fd9-7368523384e2) [**Blog](https://www.opslogix.com/blog) # Can’t access UNIX/Linux computer view in Administration pane SCOM 2012 by [Opslogix](https://www.opslogix.com/blog/author/opslogix), on Jan 29, 2018 11:45:48 AM If you can’t access the UNIX/Linux computers view in the Administration pane in Microsoft System Center 2012 R2 Operations Manager, then you probably receive the following error message:   [box] Date: 12/30/2017 7:48:49 PM Application: Operations Manager Application Version: 7.1.10226.1360 Severity: Error Message: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.SystemCenter.CrossPlatform.UI.OM.Integration.UnixComputerOperatingSystemHelper.JoinCollections(IEnumerable`1 managementServers, IEnumerable`1 resourcePools, IEnumerable`1 unixcomputers, IEnumerable`1 operatingSystems) at Microsoft.SystemCenter.CrossPlatform.UI.OM.Integration.UnixComputerOperatingSystemHelper.GetUnixComputerOperatingSystemInstances(String criteria) at Microsoft.SystemCenter.CrossPlatform.UI.OM.Integration.Administration.UnixAgentQuery.DoQuery(String criteria) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Cache.Query`1.DoQuery(String criteria, Nullable`1 lastModified) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Cache.Query`1.FullUpdateQuery(CacheSession session, IndexTable& indexTable, Boolean forceUpdate, DateTime queryTime) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Cache.Query`1.InternalSyncQuery(CacheSession session, IndexTable indexTable, UpdateReason reason, UpdateType updateType) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Cache.Query`1.InternalQuery(CacheSession session, UpdateReason reason) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Cache.Query`1.TryDoQuery(UpdateReason reason, CacheSession session) at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ConsoleJobExceptionHandler.ExecuteJob(IComponent component, EventHandler`1 job, Object sender, ConsoleJobEventArgs args)[/box]   ## Cause The issue occurs if the UNIX/Linux monitoring resource pool is deleted   ## How to solve it! To resolve the issue, follow these steps: 1. Create a resource pool for UNIX/Linux monitoring. Give the new pool a different name than the name of the deleted resource pool. 2. Add the management servers that perform UNIX/Linux monitoring to the new resource pool. 3. Configure the UNIX/Linux Run As accounts to be distributed by the new resource pool. To do this, follow these steps: - In the Operations console, go to **Administration **> **Run As Configuration** > **UNIX/Linux Accounts**. - For each account, follow these steps: - Right-click the account, and then select **Properties**. -  On the **Distribution Security** page of the UNIX/Linux Run As Accounts Wizard, select **More Secure**. -  In **Selected computers and resource pools**, select **Add**. -  Select **Search by resource pool name**, and then select **Search**. -  Select the new resource pool that is created in step 1, select **Add**, and then select **OK**. 4. Run the following PowerShell cmdlet to retrieve the managed UNIX and Linux computers: **`Get-SCXAgent`** 5. Verify that the agents that are associated with the deleted resource pool still exist and that the relationship remains. 6. Run the following command to change the managing resource pool to the one that is created in step 1: ``` $SCXPool = Get-SCOMResourcePool -DisplayName "" Get-SCXAgent | Set-SCXResourcePool -ResourcePool $SCXPool ```     ## Comments ### About our blog Our blog is where you can find anything related to our products, product releases, company or just some other important information we think you - as our reader would like to know! If you have a topic or question you think that we should address, but don't find it in our archive you can always have a look at our knowledge base. - [Recent](https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager#recent) - [Topics](https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager#topics) - [Archive](https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager#archive) - [authoring (1)](https://www.opslogix.com/blog/tag/authoring) - [Best Practices (2)](https://www.opslogix.com/blog/tag/best-practices) - [Career (1)](https://www.opslogix.com/blog/tag/career) - [Case Study (2)](https://www.opslogix.com/blog/tag/case-study) - [DevOps (5)](https://www.opslogix.com/blog/tag/devops) - [Digital Operations (2)](https://www.opslogix.com/blog/tag/digital-operations) - [Events (11)](https://www.opslogix.com/blog/tag/events) - [EZalert (1)](https://www.opslogix.com/blog/tag/ezalert) - [Framework (1)](https://www.opslogix.com/blog/tag/framework) - [Free (3)](https://www.opslogix.com/blog/tag/free) - [Grafana (4)](https://www.opslogix.com/blog/tag/grafana) - [How-to (8)](https://www.opslogix.com/blog/tag/how-to) - [Kubernetes (13)](https://www.opslogix.com/blog/tag/kubernetes) - [Management Pack (39)](https://www.opslogix.com/blog/tag/management-pack) - [Monitoring (14)](https://www.opslogix.com/blog/tag/monitoring) - [Monitoring as a Service (5)](https://www.opslogix.com/blog/tag/monitoring-as-a-service) - [News (6)](https://www.opslogix.com/blog/tag/news) - [News (3)](https://www.opslogix.com/blog/tag/news) - [Opslogix (31)](https://www.opslogix.com/blog/tag/opslogix) - [Oracle (8)](https://www.opslogix.com/blog/tag/oracle) - [Ping (2)](https://www.opslogix.com/blog/tag/ping) - [Press Release (4)](https://www.opslogix.com/blog/tag/press-release) - [Ransomware (1)](https://www.opslogix.com/blog/tag/ransomware) - [SCOM (57)](https://www.opslogix.com/blog/tag/scom) - [SCOM (12)](https://www.opslogix.com/blog/tag/scom) - [ServiceNow (2)](https://www.opslogix.com/blog/tag/servicenow) - [Teams (2)](https://www.opslogix.com/blog/tag/teams) - [Teams Connector (6)](https://www.opslogix.com/blog/tag/teams-connector) - [Training (2)](https://www.opslogix.com/blog/tag/training) - [Update Release (29)](https://www.opslogix.com/blog/tag/update-release) - [VMware (33)](https://www.opslogix.com/blog/tag/vmware) - [vSAN (3)](https://www.opslogix.com/blog/tag/vsan) - [Webinar (2)](https://www.opslogix.com/blog/tag/webinar) [More...](https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager#) - [May 2026 (1)](https://www.opslogix.com/blog/archive/2026/05) - [April 2026 (3)](https://www.opslogix.com/blog/archive/2026/04) - [August 2025 (1)](https://www.opslogix.com/blog/archive/2025/08) - [July 2025 (5)](https://www.opslogix.com/blog/archive/2025/07) - [June 2025 (1)](https://www.opslogix.com/blog/archive/2025/06) - [May 2025 (1)](https://www.opslogix.com/blog/archive/2025/05) - [February 2025 (1)](https://www.opslogix.com/blog/archive/2025/02) - [December 2024 (1)](https://www.opslogix.com/blog/archive/2024/12) - [November 2024 (2)](https://www.opslogix.com/blog/archive/2024/11) - [October 2024 (2)](https://www.opslogix.com/blog/archive/2024/10) - [September 2024 (2)](https://www.opslogix.com/blog/archive/2024/09) - [August 2024 (1)](https://www.opslogix.com/blog/archive/2024/08) - [May 2024 (1)](https://www.opslogix.com/blog/archive/2024/05) - [February 2024 (1)](https://www.opslogix.com/blog/archive/2024/02) - [January 2024 (1)](https://www.opslogix.com/blog/archive/2024/01) - [December 2023 (2)](https://www.opslogix.com/blog/archive/2023/12) - [November 2023 (3)](https://www.opslogix.com/blog/archive/2023/11) - [October 2023 (2)](https://www.opslogix.com/blog/archive/2023/10) - [September 2023 (2)](https://www.opslogix.com/blog/archive/2023/09) - [August 2023 (1)](https://www.opslogix.com/blog/archive/2023/08) - [July 2023 (2)](https://www.opslogix.com/blog/archive/2023/07) - [June 2023 (2)](https://www.opslogix.com/blog/archive/2023/06) - [May 2023 (2)](https://www.opslogix.com/blog/archive/2023/05) - [April 2023 (1)](https://www.opslogix.com/blog/archive/2023/04) - [March 2023 (1)](https://www.opslogix.com/blog/archive/2023/03) - [February 2023 (1)](https://www.opslogix.com/blog/archive/2023/02) - [October 2022 (1)](https://www.opslogix.com/blog/archive/2022/10) - [August 2022 (2)](https://www.opslogix.com/blog/archive/2022/08) - [May 2022 (3)](https://www.opslogix.com/blog/archive/2022/05) - [February 2022 (7)](https://www.opslogix.com/blog/archive/2022/02) - [January 2022 (4)](https://www.opslogix.com/blog/archive/2022/01) - [December 2021 (6)](https://www.opslogix.com/blog/archive/2021/12) - [November 2021 (4)](https://www.opslogix.com/blog/archive/2021/11) - [October 2021 (4)](https://www.opslogix.com/blog/archive/2021/10) - [January 2021 (2)](https://www.opslogix.com/blog/archive/2021/01) - [November 2020 (1)](https://www.opslogix.com/blog/archive/2020/11) - [October 2020 (2)](https://www.opslogix.com/blog/archive/2020/10) - [September 2020 (2)](https://www.opslogix.com/blog/archive/2020/09) - [June 2020 (3)](https://www.opslogix.com/blog/archive/2020/06) - [May 2020 (2)](https://www.opslogix.com/blog/archive/2020/05) - [April 2020 (1)](https://www.opslogix.com/blog/archive/2020/04) - [March 2020 (4)](https://www.opslogix.com/blog/archive/2020/03) - [February 2020 (2)](https://www.opslogix.com/blog/archive/2020/02) - [January 2020 (3)](https://www.opslogix.com/blog/archive/2020/01) - [December 2019 (1)](https://www.opslogix.com/blog/archive/2019/12) - [August 2019 (1)](https://www.opslogix.com/blog/archive/2019/08) - [June 2019 (2)](https://www.opslogix.com/blog/archive/2019/06) - [April 2019 (1)](https://www.opslogix.com/blog/archive/2019/04) - [January 2019 (1)](https://www.opslogix.com/blog/archive/2019/01) - [November 2018 (3)](https://www.opslogix.com/blog/archive/2018/11) - [September 2018 (1)](https://www.opslogix.com/blog/archive/2018/09) - [August 2018 (2)](https://www.opslogix.com/blog/archive/2018/08) - [July 2018 (1)](https://www.opslogix.com/blog/archive/2018/07) - [June 2018 (1)](https://www.opslogix.com/blog/archive/2018/06) - [May 2018 (1)](https://www.opslogix.com/blog/archive/2018/05) - [April 2018 (3)](https://www.opslogix.com/blog/archive/2018/04) - [March 2018 (2)](https://www.opslogix.com/blog/archive/2018/03) - [February 2018 (2)](https://www.opslogix.com/blog/archive/2018/02) - [January 2018 (2)](https://www.opslogix.com/blog/archive/2018/01) - [January 1970 (1)](https://www.opslogix.com/blog/archive/1970/01) [More...](https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager#) ### Subscribe to Updates ### Opslogix BV IJburglaan 630H 1087 CE Amsterdam The Netherlands Call us: [+31 20 893 2048](tel:+31208932048) VAT NL820308195B01 Office hours are 9am – 5pm CET (Central European Time) [Privacy Policy](https://opslogix-4447944.hs-sites.com/privacy-policy) ### Subscribe To Newsletter Copyright © Opslogix BV. All Rights Reserved. ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Opslogix", "url" : "https://www.opslogix.com/blog/author/opslogix" }, "dateModified" : "2025-07-18T11:15:34.290Z", "datePublished" : "2018-01-29T10:45:48.000Z", "headline" : "Can’t access UNIX/Linux computer view in Administration pane SCOM 2012", "mainEntityOfPage" : { "@id" : "https://www.opslogix.com/blog/cant-access-unixlinux-computers-view-administration-pane-microsoft-system-center-2012-r2-operations-manager", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.opslogix.com/hubfs/opslogix_graphics/logotype/OpsLogixPNG_Red_Box_White_Text.png" }, "name" : "Opslogix" } } ```