topic Re: PowerShelll Error: Method invocation failed because .... in Microsoft Virtualization Discussions

PowerShelll Error: Method invocation failed because ....

rdenyer001 — Thu, 05 Jun 2025 05:20:49 GMT

All,

Very new to scripting/powershell and have a task to move many viloumes from and old 7-mode filer 7.3.6 to a new filer 7 mode 8.2.2 (unfortunealty can't go cDOT)

Trying to write a script that will allow me to put in the name of the volume on the old system and its size and then have the script create the volume on the new system and then complete the snap mirror initialize.

Here is my script ( made up of parts copied from various scripts found on the web)

## Controller Login Variables
Import-Module dataontap
$ntapuser = "XXXX"
$ntappw = "XXXX"
### Convert Password to plain text
$pw = convertto-securestring $ntappw -asplaintext -force
$cred = new-object -typename system.management.automation.pscredential -argumentlist $ntapuser,$pw

# Connect to Snapmirror Source and Destination
$SrcFiler = Connect-NaController XXXX -Credential $cred -https
$DestFiler = Connect-NaController XXXX -Credential $cred -https
#set volume name and size
$Vol = Read-Host 'Volume Name?'
$Size = Read-Host 'Volume Size?'
$Scr = $SrcFiler + ":" + $Vol

I get this error Method invocation failed because [NetApp.Ontapi.Filer.NaController] doesn't contain a method named 'op_Addition
$Dest = $DestFiler + ":" + $Vol

and here
# Create our destination volume
New-NaVol $Vol -Controller $DestFiler -Aggregate aggr0 -Size $Size -SpaceReserve none

I get this error here New-NaVol : Object reference not set to an instance of an object.
At C:\Users\Richard\NewMirror2.ps1:18 char:1 + New-NaVol $Vol -Controller $DestFiler -Aggregate aggr0 -Size $Size -SpaceReserve

But the volume is created
Set-NaVol -Name $Vol -Restricted -Controller $DestFiler

Same here Set-NaVol : Object reference not set to an instance of an object.
At C:\Users\Richard\NewMirror2.ps1:19 char:1 + Set-NaVol -Name $Vol -Restricted -Controller $DestFiler
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

but the volume is restricted

# Initialize Snapmirror
Invoke-NaSnapmirrorInitialize -Destination $Dest -Source $Scr

But then here, this just fails but I figure that is more related to the first error at line 15 and 16

I have downloaed and installed latest toolkit

have noticed that results coming back from the new 8.2.2 system (destination) are a LOT slower than the old 7.3.6 system

Any help and or suggestions would be greatly appriciated .

Here is the total out put from my powershell session

PS C:\Users\Richard> .\NewMirror2
Volume Name?: TestVOL
Volume Size?: 40g
Method invocation failed because [NetApp.Ontapi.Filer.NaController] doesn't contain a method named 'op_Addition'.
At C:\Users\Richard\NewMirror2.ps1:15 char:1
+ $Scr = $SrcFiler + ":" + $Vol
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (op_Addition:String) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound

Method invocation failed because [NetApp.Ontapi.Filer.NaController] doesn't contain a method named 'op_Addition'.
At C:\Users\Richard\NewMirror2.ps1:16 char:1
+ $Dest = $DestFiler + ":" + $Vol
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (op_Addition:String) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound

New-NaVol : Object reference not set to an instance of an object.
At C:\Users\Richard\NewMirror2.ps1:18 char:1
+ New-NaVol $Vol -Controller $DestFiler -Aggregate aggr0 -Size $Size -SpaceReserve ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (DC-XXX:NaController) [New-NaVol], NullReferenceException
+ FullyQualifiedErrorId : VolumeListInfoFailed,DataONTAP.PowerShell.SDK.Cmdlets.Volume.NewNaVol

Set-NaVol : Object reference not set to an instance of an object.
At C:\Users\Richard\NewMirror2.ps1:19 char:1
+ Set-NaVol -Name $Vol -Restricted -Controller $DestFiler
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (DC-XXX:NaController) [Set-NaVol], NullReferenceException
+ FullyQualifiedErrorId : VolumeListInfoFailed,DataONTAP.PowerShell.SDK.Cmdlets.Volume.SetNaVol

Invoke-NaSnapmirrorInitialize : Cannot bind argument to parameter 'Destination' because it is null.
At C:\Users\Richard\NewMirror2.ps1:22 char:45
+ Invoke-NaSnapmirrorInitialize -Destination $Dest -Source $Scr
+ ~~~~~
+ CategoryInfo : InvalidData&colon; (:) [Invoke-NaSnapmirrorInitialize], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,DataONTAP.PowerShell.SDK.Cmdlets.Snapmirr
or.InvokeNaSnapmirrorInitialize

Regards,

Richard

Re: PowerShelll Error: Method invocation failed because ....

HONIG2012 — Fri, 02 Jan 2015 11:07:45 GMT

hi richard,

let's start from top - what are you expecting when doing this?

>> $Scr = $SrcFiler + ":" + $Vol ??

i don't have a clue about this

another thing what i remember to be heard is that you cannot have multiple controller connections at the same time - i think you have to connect to srcfiler first - create volume, set volume options and so on - and when you're done with the src - connect to the destination - create volume, set volume options, restrict volume and then initialize snapmirror - i think this should work.

let me know you meant and i'll try to assist.

thanks AJ

Re: PowerShelll Error: Method invocation failed because ....

JGPSHNTAP — Fri, 02 Jan 2015 14:26:56 GMT

Are you trying to do a one by one volume creation? if so why?

I've used this is the past to create in bulk to mirror a setup

$sfiler = read-host "Enter Source Filer"
$dfiler = read-host "Enter Destination Filer"

#Production Testing

##Failover testing
$srcfiler= Connect-NaController $sfiler
$dstfiler= Connect-NaController $dfiler

#define aggr
$aggr = "aggr1"

$vols = Get-NaVol -Controller $srcfiler

## Loop through existing vols

foreach ($vol in $vols) {

$volume = $vol.name
$size = $vol.totalsize
# Create new Volumes on Destination Filer
New-NaVol -Name $volume -Aggregate $aggr -SpaceReserve none -Size $size -Controller $dstfiler -confirm:$false

#Set Volume Settings
Set-NaSnapshotReserve -TargetName $volume "0" -Controller $dstfiler

#Prepare volume for Snapmirror - Restrict volume
Set-NaVol -Name $volume -restricted -Controller $dstfiler

# Setup snapmirror up
Invoke-NaSnapmirrorInitialize -destination $dfiler":"$volume -Source $sfiler":"$volume -Controller $dstfiler

# Setup Snapmirror Schedule
Set-NaSnapmirrorSchedule -destination $dfiler":"$volume -Source $sfiler":"$volume -minutes "15" -hours "0-23/4" -daysofmonth * -daysofweek * -Controller $dstfiler

}

That will setup the volumes on the new target controller, and start snapmirrors

Re: PowerShelll Error: Method invocation failed because ....

markweber — Fri, 02 Jan 2015 15:10:51 GMT

$SrcFiler and $DestFiler aren't strings like you are expecting - they are objects.

use $SrcFiler.name for the controller name (or maybe assign the filer name to a variable and use that in the connect-nacontroller command and also later on in the snapmirror initialize)

connect-nacontroller $destination

invoke-snapmirror -destination $destination:$vol -source $source:$vol

Re: PowerShelll Error: Method invocation failed because ....

rdenyer001 — Mon, 05 Jan 2015 01:58:46 GMT

Thanks JGPSHNTAP I like this will definitely keep it in my notes

Reason I am doing this voluem by volume is that the business does not want to move all the volumes but also does not want to delete any of the old data that has been collected over the last 7 years, just yet

This was my reasoning behind a script, as the IT team could then decide which volumes to take to the new filer, and all they need to do was to enter the name of the volume and its size and the script would do the rest.

Unfortunetaly my script writing ability does not keep up with my ideas , that why I use the community .

Thanks for your input

Re: PowerShelll Error: Method invocation failed because ....

rdenyer001 — Mon, 05 Jan 2015 02:00:34 GMT

Thanks Mark

Will give this a go

Re: PowerShelll Error: Method invocation failed because ....

rdenyer001 — Mon, 05 Jan 2015 02:03:11 GMT

AJ,

wwhat I was trying to get was a varible string that I could I could use in the command Invoke-NaSnapmirrorInitialize.

Thansk for you interest looks like the answer has been provied

Re: PowerShelll Error: Method invocation failed because ....

diwakar — Mon, 30 Mar 2015 19:15:11 GMT

Hello RD,

I am working with NetApp for few years but I never had the chance to work on Powershell before. I had been trying to get started with NetApp Powershell module for few days. I am able to connect to filers individually and run few cmdlets. But if I am having issues in connecting to multiple filers at once and list system info by using foreach loop in my profile. But surprisingly the same profile is working fine at times. By saying working , I am not getting any output but it runs without throwing any errors. You can see the loop I am talking about below:

foreach ($filer in $allfilers){
#connect to the storage system
Connect-NaController $filer -Credential $authentication
echo "Connecting to $filer"

echo "--------------"$filer"-------------"
get-nasysteminfo
}

In the above loop, should I give a pause or anything in order to get the filer info? You can see the errors which I am getting below:

Connect-NaController : Object reference not set to an instance of an object.
At D:\Data\WindowsPowerShell\Microsoft.PowerShell_profile.ps1:20 char:21
+ Connect-NaController <<<< $filer -Credential $authentication
+ CategoryInfo : InvalidResult: (filer1:NaController) [Connect-NaController], NullReferenceException
+ FullyQualifiedErrorId : HttpConnectionFailed,DataONTAP.PowerShell.SDK.ConnectNaController

Get-NaSystemInfo : Value in $global:CurrentNaController is not of type NetApp.Ontapi.Filer.NaController
At D:\Data\WindowsPowerShell\Microsoft.PowerShell_profile.ps1:23 char:17
+ get-nasysteminfo <<<<
+ CategoryInfo : InvalidArgument: (:) [Get-NaSystemInfo], ArgumentException
+ FullyQualifiedErrorId : ControllerNotSpecified,DataONTAP.PowerShell.SDK.Cmdlets.System.GetNaSystemInfo

Connect-NaController : Object reference not set to an instance of an object.
At D:\Data\WindowsPowerShell\Microsoft.PowerShell_profile.ps1:20 char:21
+ Connect-NaController <<<< $filer -Credential $authentication
+ CategoryInfo : InvalidResult: (filer2:NaController) [Connect-NaController], NullReferenceException
+ FullyQualifiedErrorId : HttpConnectionFailed,DataONTAP.PowerShell.SDK.ConnectNaController

Any information in this regard would be really helpfull. Thank you very much in advance.

Thanks,

MD.

Re: PowerShelll Error: Method invocation failed because ....

JGPSHNTAP — Tue, 31 Mar 2015 11:40:43 GMT

Can you please start a new thread as its easier to monitor