The script returned this:

"CurrentPC = [pccomputername]"

And now it's acting like it's locked up and doesn't close unless I close it manually.

Here is what the code looks like:

Code:
Break ON
$ = SetOption("WrapAtEOL","ON")


$LogFile		= "C:\computer_list.txt"
$OutputFile		= "C:\output_file.txt"
$OpenListFile		= OPEN(4,$LogFile,2)
$OpenLogFile 		= OPEN(5,$OutputFile,5)


If $OpenListFile = 0
  $CurrentPC = ReadLine(4)
'CurrentPC = [' + $CurrentPC + ']' ?
Get $_ 
  If $OpenLogFile = 0
    DO
      ? $CurrentPC
      $WMIService = GetObject("winmgmts:\\" + $CurrentPC + "\root\cimv2")
      $BIOSItems  = $WMIService.ExecQuery( "Select * from Win32_BIOS where PrimaryBIOS = true", , 48 )
      For Each $Item in $BIOSItems
        $BIOSName      = Trim($Item.Name)
        $BIOSVersion   = Trim($Item.Version)
        $SMBIOSVersion = Trim($Item.SMBIOSBIOSVersion)
        $SerialNumber  = Trim($Item.SerialNumber)
        $Manufacturer  = Trim($Item.Manufacturer)
      Next
      $           = WRITELINE(5,"$CurrentPC, ")
      $           = WRITELINE(5, $SerialNumber + @CRLF)
    
      $CurrentPC	= ReadLine(4)
    UNTIL @ERROR = -1
  ENDIF
ENDIF

CLOSE(4)
CLOSE(5)

Sleep 5