Creating FAST Managed Properties using Power shell

Add-PSSnapin Microsoft.SharePoint.PowerShell
if([Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint")-eq$null){throw "Unable to load Microsoft.SharePoint.dll";}

Add-PSSnapin Microsoft.FASTSearch.PowerShell
if([Reflection.Assembly]::LoadWithPartialName("Microsoft.FASTSearch.PowerShell")-eq$null){throw "Unable to load Microsoft.FASTSearch.dll";}

function SetManagedProperties([string]$mpName, [int]$mpType = 0, [string]$cpName, [int]$sortableType = 0, [bool]$isQueryable = $false, [bool]$isRefiner = $false, [string]$ftiName, [int]$indexMapping = 1){

    if($mpName -eq $null){
        Write-Host "Error: Managed Property Name is null"
        return;
    }
    if($mpType -eq 0){
        Write-Host "Error: Managed Property Type should be grater than zero"
        return;
    }   
    if($cpName -eq $null){
        Write-Host "Error: Crawled Property Name is null"
        return;
    }   
   
    $mp = Get-FASTSearchMetadataManagedProperty $mpName
   
     if($mp -ne $null){
        Remove-FASTSearchMetadataManagedProperty -Name $mpName -Force
        Write-Host "Removing existing managed property ($mpName).."
    }
       
    $cp = Get-FASTSearchMetadataCrawledProperty -Name $cpName
   
    if($cp -eq $null){
        Write-Host "Error: $cpName - Crawled Property Not Found."
        return;
    }
   
    try{
   
        $mp = New-FASTSearchMetadataManagedProperty -Name $mpName -Type $mpType
    }
    catch{
        Write-Host "Error in creating managed property - $mpName"
        return;
    }
   
    try{
        $pMapping =  New-FASTSearchMetadataCrawledPropertyMapping -CrawledProperty $cp -ManagedProperty $mp
    }
    catch{
        Write-Host "Error in Mapping managed property - $mpName & Crawled Propery - $cpName"
        return;
    }
   
    $fti =  Get-FASTSearchMetadataFullTextIndex -Name $ftiName

    try{
        New-FASTSearchMetadataFullTextIndexMapping -ManagedProperty $mp -FullTextIndex $fti -Level $IndexMapping
    }
    catch{
        Write-Host "Error in Index Mapping to Managed Property - $mpName & Crawled Propery - $cpName"
        return;
    }
   
    try{
        Set-FASTSearchMetadataManagedProperty -Name $mpName -MergeCrawledProperties $true -Queryable $isQueryble -SortableType $sortableType -RefinementEnabled $isRefiner   
    }
    catch{
        Write-Host "Error on enable Sortable, Queryable, RefinementEnabled for Managed Property - $mpName & Crawled Propery - $cpName"
        return;
    }
    Write-Host "$mpName created successfully!"
}

#mpType (1-Text, 2-Integer, 3-Boolean, 4-Float, 5-decimal, 6-DateTime)
#sortableType (0-Disabled, 1-Enabled)
#indexMapping (1 to 7)
SetManagedProperties -mpName "ManagedPropertyName" -mpType 1 -cpName "CrawledPropertyName" -sortableType 0 -isQueryable $false -isRefiner $false -ftiName "Content" -indexMapping 1