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BUG: ScheduledTasks module broken in 1511

ICAN use New-SchedualedTaskTrigger -AtSartup without error SO THAT I can schedule tasks

Repeat issue: update win10 to 1511 and run this command in PowerShell
New-ScheduledTaskTrigger -AtStartup
New-ScheduledTaskTrigger : Method "NewTriggerByStartup" not found
At line:1 char:1
+ New-ScheduledTaskTrigger -AtStartup
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo          : ObjectNotFound: (PS_ScheduledTask:Root/Microsoft/...S_ScheduledTask) [New-ScheduledTaskTrigger], CimException

+ FullyQualifiedErrorId : HRESULT 0x80041002,New-ScheduledTaskTrigger

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David Jones shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

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  • Michel Boivin commented  ·   ·  Flag as inappropriate

    Ran into the exact same issue on a few systems. Running "mofcomp C:\Windows\System32\wbem\SchedProv.mof" does resolve the problem.

    I'm calling the New-ScheduledTaskTrigger cmdlet as part of the installation
    process of an application I'm developing. I'm concerned about adverse effects
    of calling mofcomp without the user being aware. Should mofcomp be reserved to
    sys admins or it's a failure safe operation I can add to my installation
    process without risk?

  • Mathieu Buisson commented  ·   ·  Flag as inappropriate

    Well done David !

    After running the command : mofcomp C:\Windows\System32\wbem\SchedProv.mof ,
    I have no problem anymore with the parameter -Once as well.

    Also, it made additional methods visible for the PS_ScheduledTask CIM class :

    PS C:\> $PS_ScheduledTaskClass = Get-CimClass -Namespace root/Microsoft/Windows/TaskScheduler -ClassName PS_Sched
    uledTask
    PS C:\> $PS_ScheduledTaskClass.CimClassMethods.Name
    RegisterByObject
    RegisterByPrincipal
    RegisterByUser
    RegisterByXml
    NewActionByExec
    NewPrincipalByGroup
    NewPrincipalByUser
    NewSettings
    StartByObject
    StartByPath
    StopByObject
    StopByPath
    SetByObject
    SetByPrincipal
    SetByUser
    GetInfoByName
    GetInfoByObject
    New
    ExportByName
    ExportByObject
    EnableByName
    EnableByObject
    DisableByName
    DisableByObject
    NewTriggerByDaily
    NewTriggerByOnce
    NewTriggerByLogon
    NewTriggerByStartup
    NewTriggerByWeekly

  • Mathieu Buisson commented  ·   ·  Flag as inappropriate

    Same error when using the -Once parameter of New-ScheduledTaskTrigger .

    For example :

    PS C:\> New-ScheduledTaskTrigger -Once -At "18:00"
    New-ScheduledTaskTrigger : Method "NewTriggerByOnce" not found
    At line:1 char:1
    + New-ScheduledTaskTrigger -Once -At "18:00"
    + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo : ObjectNotFound: (PS_ScheduledTask:Root/Microsoft/...S_ScheduledTask) [New-Schedul
    edTaskTrigger], CimException
    + FullyQualifiedErrorId : HRESULT 0x80041002,New-ScheduledTaskTrigger

    I am also using build 1511 of Windows 10.
    PS C:\> $PSVersionTable

    Name Value
    ---- -----
    PSVersion 5.0.10586.63
    PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
    BuildVersion 10.0.10586.63
    CLRVersion 4.0.30319.42000
    WSManStackVersion 3.0
    PSRemotingProtocolVersion 2.3
    SerializationVersion 1.1.0.1

    This has been encountered by several people, here for example :
    http://powershell.org/wp/forums/topic/method-newtriggerbyonce-not-found/

    This may be interesting information to troubleshoot :

    PS C:\> $error[0].categoryinfo

    Category : ObjectNotFound
    Activity : New-ScheduledTaskTrigger
    Reason : CimException
    TargetName : PS_ScheduledTask
    TargetType : Root/Microsoft/Windows/TaskScheduler/PS_ScheduledTask

    It seems the cmdlet cannot find a method called "NewTriggerByOnce" of the CIM class PS_ScheduledTask.

    PS C:\> $PS_ScheduledTaskClass = Get-CimClass -Namespace root/Microsoft/Windows/TaskScheduler -ClassName PS_ScheduledTask

    PS C:\> $PS_ScheduledTaskClass.CimClassMethods.Name
    RegisterByObject
    RegisterByPrincipal
    RegisterByUser
    RegisterByXml
    NewActionByExec
    NewPrincipalByGroup
    NewPrincipalByUser
    NewSettings
    StartByObject
    StartByPath
    StopByObject
    StopByPath
    SetByObject
    SetByPrincipal
    SetByUser
    GetInfoByName
    GetInfoByObject
    New
    ExportByName
    ExportByObject
    EnableByName
    EnableByObject
    DisableByName
    DisableByObject

    Indeed, the method is not visible here.

    PS C:\> Get-CimClass -MethodName "*TriggerByOnce*"

    --> Nothing.
    So I can't see any CIM class which has a method with a name similar to what the cmdlet is looking for.

  • David Jones commented  ·   ·  Flag as inappropriate

    workarround:
    PS C:\WINDOWS\system32> New-ScheduledTaskTrigger -AtStartup
    New-ScheduledTaskTrigger : Method "NewTriggerByStartup" not found
    At line:1 char:1
    + New-ScheduledTaskTrigger -AtStartup
    + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo : ObjectNotFound: (PS_ScheduledTask:Root/Microsoft/...S_ScheduledTask) [New-ScheduledTaskT
    rigger], CimException
    + FullyQualifiedErrorId : HRESULT 0x80041002,New-ScheduledTaskTrigger

    PS C:\WINDOWS\system32> mofcomp C:\Windows\System32\wbem\SchedProv.mof
    Microsoft (R) MOF Compiler Version 10.0.10586.0
    Copyright (c) Microsoft Corp. 1997-2006. All rights reserved.
    Parsing MOF file: C:\Windows\System32\wbem\SchedProv.mof
    MOF file has been successfully parsed
    Storing data in the repository...
    Done!
    PS C:\WINDOWS\system32> New-ScheduledTaskTrigger -AtStartup

    Enabled : True
    EndBoundary :
    ExecutionTimeLimit :
    Id :
    Repetition :
    StartBoundary :
    Delay :
    PSComputerName :

    PS C:\WINDOWS\system32>

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