Network Utilization script throws error after re-executing

Question

Hi everyone, I have a piece of code that finds the network util of a fileserver and if it is over 75% it stops executing the script. The script works the first time but after re-executing it, it throws an error. I've tried to null out all the variables I'm
using but it still won't work. Any help is appreciated! Thanks!
Code:
#Determines NIC utilization
$interfacebw = $null
$intbwbytes =$null
$currentbytespersec = $null
$linkutil = $null
Write-Host "Determining File Server Network Utilization.."
$interfacebw = Get-WmiObject -class Win32_PerfFormattedData_Tcpip_NetworkInterface -ComputerName tsvc2552101x001 | where {$_.Name -eq "Broadcom NetXtreme Gigabit Ethernet"} |select CurrentBandwidth
$intbwbytes = $interfacebw.currentbandwidth /8
$currentbytespersec = Get-WmiObject -class Win32_PerfFormattedData_Tcpip_NetworkInterface -ComputerName tsvc2552101x001 | where {$_.Name -eq "Broadcom NetXtreme Gigabit Ethernet"} |select BytesTotalPersec
[int]$currentbytespersec = $currentbytespersec.bytestotalpersec
if($currentbytespersec -le 0){
[int]$linkutil = 0
}else{
[int]$linkutil = ($currentbytespersec / $intbwbytes) * 100
#if NIC util is over 75 then it closes program
if($linkutil -gt 75){
$wshell.Popup("Network utilization over 75%, please try again later.",0,"Error",0x1) | Out-Null
$formSoftwareInstaller.Close()
return
Error:
Cannot convert value "@{BytesTotalPersec=3560}" to type "System.Int32". Error: "Cannot convert the "@{BytesTotalPersec=3560}" value of type "Selected.System.Management.ManagementObject" to type "System.Int32"."
At C:\Users\cody-horton\Desktop\Software Installer.ps1:406 char:9
+ $currentbytespersec = Get-WmiObject -class Win32_PerfFormattedData_Tcpip ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : MetadataError: (:) [], ArgumentTransformationMetadataException
+ FullyQualifiedErrorId : RuntimeException

Answer 1

This is all you need to do.  You are way over coding this.
Write-Host "Determining File Server Network Utilization.."
$perfdata=Get-WmiObject -class Win32_PerfFormattedData_Tcpip_NetworkInterface -ComputerName tsvc2552101x001 -Filter 'Name="Broadcom NetXtreme Gigabit Ethernet"'
$intbwbytes=$perfdata.currentbandwidth/8
$currentbytespersec=$perfdata.BytesTotalPersec
#if NIC util is over 75 then it closes program
if(($currentbytespersec / $intbwbytes) -gt .75){
$wshell.Popup("Network utilization over 75%, please try again later.",0,"Error",0x1) | Out-Null
$formSoftwareInstaller.Close()
return
¯\_(ツ)_/¯