0

Our OpsLogix Ping Management Pack randomly stopped working and the error is posted below (anyone seen this before?).  So, the plan is to remove this Management Pack and re-add, however, we must remove the dependencies first.

We’ve taken care of most of them but the Management Pack that contains information related to our Distributed Applications has 100+ references for OpsLogix because we use many Distributed Apps that each refer to a OpsLogix Ping monitored device.  Instead of editing out the many references, should we just delete that Management Pack altogether, re-install the Ping Management Pack, and import the backup of the Management Pack again?

We use Distributed Applications for one of our most important dashboards, so we want to ensure that we won’t lose anything by deleting out the associated Management Pack temporarily.

 

Here is the error we get when trying to remove devices from OpsLogix Ping Dashboard

 

Here is the error and I had seen another post about this with no resolution

https://social.technet.microsoft.com/Forums/de-DE/88b80dae-5d20-4c9b-ae9c-434f2b520420/opslogix-not-able-to-remove-the-servers-from-ping-check-monitoring?forum=operationsmanagergeneral

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Ping.UI.Services.ScomService.RemoveTargetInstance(String hostName, String targetName, String targetDisplayName)
at Ping.UI.Models.HostModel.RemoveTargets(IEnumerable`1 targets)
at Ping.UI.Presenters.TargetHostPresenter._targetSourceHostView_RemoveTargetsEvent(Object sender, RemoveTargetsEventArgs e)
at Ping.UI.UserControls.TargetHostControl.removeTargetHostButton_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

 

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Assembly Version: 7.0.5000.9
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CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
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Microsoft.SystemCenter.Advisor.UI
Assembly Version: 7.0.5000.9
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.DiagramFx
Assembly Version: 7.1.1000.0
Win32 Version: 7.1.3840.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.DiagramFx.DLL
—————————————-
Microsoft.SystemCenter.Advisor.UI.resources
Assembly Version: 7.0.5000.9
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Modules.Apm.TfsWISync.Common
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Interop.Shell32
Assembly Version: 7.1.10226.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Modules.Apm.AlertAttachment.Modules
Assembly Version: 7.0.5000.9
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Modules.ModuleDebug
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Modules.Apm.TfsWISync.ComponentTasks
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.HealthService
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.Mom.Modules.DataTypes
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10184.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.Mom.Modules.DataTypes.DLL
—————————————-
WPF.OpsLogix.IMP.Base.UI
Assembly Version: 3.0.0.42
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Monitoring.SyntheticTransaction.UnitComponents.Wpf
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Modules.Apm.AlertAttachment.ComponentTasks
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.EnterpriseManagement.Monitoring.ServiceLevel.Components
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.Windows.Server.2016.Components.WPF
Assembly Version: 10.0.19.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.SystemCenter.Visualization.Component.Library.WPF
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Accessibility
Assembly Version: 4.0.0.0
Win32 Version: 4.7.3062.0 built by: NET472REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
—————————————-
Microsoft.SQLServer.Visualization.Library.DataObjectContext.Wpf
Assembly Version: 7.0.7.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
System.Windows.Interactivity
Assembly Version: 4.0.0.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.SQLServer.Visualization.Library.Entities.Wpf
Assembly Version: 7.0.7.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Microsoft.SQLServer.Visualization.Library.Controls.Wpf
Assembly Version: 7.0.7.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
Ping.UI
Assembly Version: 1.0.0.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/Microsoft.EnterpriseManagement.Presentation.Core.dll
—————————————-
System.Xml.Linq
Assembly Version: 4.0.0.0
Win32 Version: 4.7.3062.0 built by: NET472REL1
CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml.Linq/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.Linq.dll
—————————————-
Microsoft.EnterpriseManagement.Monitoring.Components.resources
Assembly Version: 7.0.5000.0
Win32 Version: 7.1.10226.0
CodeBase: file:///C:/Program%20Files/System%20Center%20Operations%20Manager%202012/Console/en/Microsoft.EnterpriseManagement.Monitoring.Components.resources.DLL
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************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:

<configuration>
<system.windows.forms jitDebugging=”true” />
</configuration>

When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

BlakeTheITGuy answered
    • Can you send the whole error please! Also, "object reference not set to an instance of an object" tends to mean that something (an object) was removed. Did you have a source agent that has now been removed?
    • I have updated the post with the error message as well as a similar complaint I saw online. No source agent was removed.