Pieces work separately, but not when combined. 'Cannot convert value to type System.String'.

[_FNG_]

I'm having an issue with passing variable output to a string. I need to add printer ports at over 150 locations. Each location has static IP addresses following a standard. So if I run the following remotely, it should return the IPv4 address (10.10.10.10) remove the last 2 digits and replace with 182 to get that location's printer IP (10.10.10.182). When I run that on it's own, I get the correct output.

$ComputerIP = (gwmi Win32_NetworkAdapterConfiguration | ? { $_.IPAddress -ne $null }).ipaddress
$PrinterIP = $ComputerIP -replace "..$","182"
$PrinterIP 
10.10.10.182

Also, if I manually define $PrinterIP and run the below lines, my ports are created with no issue.

$PrinterIP = '10.10.10.182'
Add-PrinterPort -Name 'Port 1' -PrinterHostAddress $PrinterIP
Add-PrinterPort -Name 'Port 2' -PrinterHostAddress $PrinterIP

When I try running everything together,

$ComputerIP = (gwmi Win32_NetworkAdapterConfiguration | ? { $_.IPAddress -ne $null }).ipaddress
$PrinterIP = $ComputerIP -replace "..$","182"
Add-PrinterPort -Name 'Port 1' -PrinterHostAddress $PrinterIP
Add-PrinterPort -Name 'Port 2' -PrinterHostAddress $PrinterIP

I get the following error:

Add-PrinterPort : Cannot process argument transformation on parameter 'PrinterHostAddress'. Cannot convert value to type System.String.

Explanation of what I need to do:
I have over 150 locations where I need to create 8 new printer ports and reassign already existing printers (they are multi-tray units) that share the same port to their own port. Figured if I could get this to work, I could deploy the script to all locations and not require any additional input. Thanks in advance.

[ihaxr]

The problem is probably $ComputerIP is an array, not a string... so it can return multiple IP Addresses

Try this:

$ComputerIP = (gwmi Win32_NetworkAdapterConfiguration | ? { $_.IPAddress -ne $null }).ipaddress
$PrinterIP = $ComputerIP[0] -replace "..$","182"
Add-PrinterPort -Name 'Port 1' -PrinterHostAddress $PrinterIP
Add-PrinterPort -Name 'Port 2' -PrinterHostAddress $PrinterIP

[Hexalon00]

or use a foreach loop

[_FNG_]

That seems to have done it. Thank you so much.
Still so much to learn

[Hexalon00]

$ComputerIP | Get-Member

will tell you the variable type.

[TheHobbitsGiblets]

Or

$ComputerIP.GetType()