VBScript Environment variables - vbscript

Question

I have a question regarding how I should go about fixing an error that I am seeing when running my script. I am pretty sure it has to do with the way in which I am using the %COMPUTERNAME% environment variable.
What my script does is it zips up some files locally, then copies them using robocopy to a mounted or shared drive, then checks to see if the file sizes are the same, and if they are then it deletes the files on the original computer. If any step in the process produces an error it exits the script.
Now the script works perfectly fine if I do not add in the "%COMPUTERNAME%" to the final destination path. (Where the zipped files will eventually be) I need the zipped files to be placed into their own folders with the name of the host from which it originated, because this script will be run on many different machines all going to the same location.
So basically it needs to look something like this:
E:\LocalHostName\TestZip.zip
Now the script will build the folder just fine when the zipped files are being copied over, the problem occurs once the file size check starts. I am getting the error of "File not found" for the line "FileToBeCompared2". I understand why the error is being produced, because it is not recogizing the %COMPUTERNAME% environment variable, but I do not know how to go about addressing this issue.
I am also going to try to add in some functionality where if an error occurs a text file with something like "An error occured during the script" is produced in the output folder.
Thank you for all your help in advance. The script is found below:
'-------------------------------------------------------------------------------------------
'This script is used to zip files locally, copy them to a new location, verify that the
'files were copied correctly, and then delete the files from the original source.
'In it's current state it is being used as a means to zip event files and move them
'to a central location.
'Run with administrator priveleges.
'-----------------------------------------------------------------------------------------------------
Option Explicit
Dim sDirectoryPath, sLocalDestinationPath, sFinalDestinationPath, sOutputFilename, Shell, sFileExt, sFilePrefix
Set Shell = WScript.CreateObject("WScript.Shell")
'Specify Directory Path where files to be zipped are located
'Specify local destination for zipped files
'Specify final destination path for zippped files
'Specify file extension name to look for
'Specify prefix of filename to look for
sDirectoryPath = "C:\Testscripts\"
sLocalDestinationPath = "C:\ScriptOutput\"
sFinalDestinationPath = "E:\CopyTestFolder\" & sOutputFilename & "\"
sFileExt = ".evtx"
sFilePrefix = "Archive*"
sOutputFilename = shell.ExpandEnvironmentStrings("%COMPUTERNAME%") 'Environment variables needed for grabbing hostname
Dim ZipCommand, RobocopyCommand, RunCommand, filesys, filetext
Dim d : d = Date()
Dim dateStr : dateStr = Year(d) & "-" & Right("00" & Month(d), 2) & "-" & Right("00" & Day(d), 2) 'Date String
Dim t : t = Time()
Dim timeStr: timeStr = Hour(t) & "-" & Right("00" & Minute(t), 2) & "-" & Right("00" & Second(t), 2) 'Time String
Dim FullFileName
FullFileName = sOutputFilename & "-" & dateStr & "-" & timeStr & ".zip "
'Following command runs 7-zip and grabs the files to be zipped from your set sDirectoryPath, zips them into set sLocalDestinationPath
'and names the file with the localhost name and date/time
ZipCommand = """C:\Program Files\7-zip\7z.exe"" a " & sLocalDestinationPath & FullFileName & sDirectoryPath & sFilePrefix & sFileExt
RunCommand = Shell.Run(ZipCommand,0,true)
if err.Number <> 0 then
WScript.Echo "An error has occurred during the zip process, re-run Script." WScript.Quit
end if
Wscript.Sleep 2000
'The following command creates a folder named after the host computer where the files are being copied from
Dim newfolder, newfolderpath, filesys2
newfolderpath = "E:\CopyTestFolder\" & sOutputFilename & "\"
set filesys2 = CreateObject("Scripting.FileSystemObject")
If Not filesys2.FolderExists(newfolderpath) Then
Set newfolder = filesys2.CreateFolder(newfolderpath)
End If
'Following command runs Robocopy from command line, moves files from your set sLocalDestinationPath to your set sFinalDestinationPath
WScript.Echo "Robocopy.exe " & sLocalDestinationPath & " " & sFinalDestinationPath
RobocopyCommand = "Robocopy.exe " & sLocalDestinationPath & " " & sFinalDestinationPath
RunCommand = Shell.Run(RobocopyCommand,0,true)
if err.Number <> 0 then
WScript.Echo "An error has occured copying the files, re-run Script."
WScript.Quit
end if
Dim fso, FileToBeCompared1, FileToBeCompared2
Set fso = CreateObject("Scripting.FileSystemObject")
'Setting the Local file to be compared
Set FileToBeCompared1 = fso.GetFile(sLocalDestinationPath & FullFileName)
WScript.echo sFinalDestinationPath & FullFileName
'Setting the file copied to final destination to be compared
Set FileToBeCompared2 = fso.GetFile(sFinalDestinationPath & FullFileName)
If FileToBeCompared1.size = FileToBeCompared2.size then
fso.DeleteFile("C:\Testscripts\Archive*.evtx") 'This will be the path where events are being Archived to. (Non restricted path)
fso.DeleteFolder("C:\ScriptOutput") 'This deletes the archive folder that 7-zip builds each time this script is run
else
WScript.Echo "File sizes do not match, File was not fully copied, Re run script."
WScript.Quit
end if

Answer 1

Because fso.GetFile() will not automatically expand %COMPUTERNAME%, modify sFinalDestinationPath to use sOutputFilename like this:
sOutputFilename = shell.ExpandEnvironmentStrings("%COMPUTERNAME%")
sFinalDestinationPath = "E:\CopyTestFolder\" & sOutputFilename & "\"