You cannot call a method on a null-valued expression _ trying to configure multipathing

[astrolab]

Trying to set LB-Latency multipathing to hosts :

$esxihosts = get-cluster CLU | get-vmhost

foreach ($esxihost in $esxihosts) {

$esxcli = Get-EsxCli  -VMhost $esxihost -V2

$hpprule = @{

description = "Pure Storage FlashArray NVME Rule"

model = "Pure*"

type = "vendor"

vendor = "NVMe"

rule = "103"

plugin = "HPP"

configstring = "pss=LB-Latency,latency-eval-time=180000"

}

$esxcli.storage.core.claimrule.add.Invoke($hpprule)

}

Error message is "

Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

Can you help me troubleshoot ? Thanks

[astrolab]

Oh and I apologize, I went past the  error message in the title , forgot to change it .

[LucD]

The key 'description' is not a valid key.
You can check which arguments are available with 

$esxcli.storage.core.claimrule.add.CreateArgs()

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Blog: lucd.info  Twitter: @LucD22  Co-author PowerCLI Reference

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[astrolab]

I must have dreamt of it . Thank you .