Getting No Output from my Powershell Functions - powershell

Question

Sorry if you have seen this code but I did make some tweaks after I accepted the answer and got some interesting results and wasn't able to reopen previous thread for continuance.
My powershell seems to be running but the function calls are producing no result after $filestore in function execute. What is going on? Are my functions not reading the inputs due to lack of global variables?
$filestore = Import-Excel 'C:\594 Sample of Filestore.xlsx'
function Import-Excel
{
param (
[string]$FileName,
[string]$WorksheetName,
[bool]$DisplayProgress = $true
)
if ($FileName -eq "") {
throw "Please provide path to the Excel file"
Exit
}
if (-not (Test-Path $FileName)) {
throw "Path '$FileName' does not exist."
exit
}
$FileName = Resolve-Path $FileName
$excel = New-Object -com "Excel.Application"
$excel.Visible = $false
$workbook = $excel.workbooks.open($FileName)
if (-not $WorksheetName) {
Write-Warning "Defaulting to the first worksheet in workbook."
$sheet = $workbook.ActiveSheet
} else {
$sheet = $workbook.Sheets.Item($WorksheetName)
}
if (-not $sheet)
{
throw "Unable to open worksheet $WorksheetName"
exit
}
$sheetName = $sheet.Name
$columns = $sheet.UsedRange.Columns.Count
$lines = $sheet.UsedRange.Rows.Count
Write-Warning "Worksheet $sheetName contains $columns columns and $lines lines of data"
$fields = #()
for ($column = 1; $column -le $columns; $column ++) {
$fieldName = $sheet.Cells.Item.Invoke(1, $column).Value2
if ($fieldName -eq $null) {
$fieldName = "Column" + $column.ToString()
}
$fields += $fieldName
}
$line = 2
for ($line = 2; $line -le $lines; $line ++) {
$values = New-Object object[] $columns
for ($column = 1; $column -le $columns; $column++) {
$values[$column - 1] = $sheet.Cells.Item.Invoke($line, $column).Value2
}
$row = New-Object psobject
$fields | foreach-object -begin {$i = 0} -process {
$row | Add-Member -MemberType noteproperty -Name $fields[$i] -Value $values[$i]; $i++
}
$row
$percents = [math]::round((($line/$lines) * 100), 0)
if ($DisplayProgress) {
Write-Progress -Activity:"Importing from Excel file $FileName" -Status:"Imported $line of total $lines lines ($percents%)" -PercentComplete:$percents
}
}
$workbook.Close()
$excel.Quit()
}
function FindFiles {
param(
[string]$filestore
)
$length = $filestore.Length
$GuidArray = #()
for($line=0;$line -le $filestore.Count;$line++){
$check = $filestore[$line]
echo $check
$length2 = $check.Length
$fileGuid = $check | ForEach-Object{$_.FileGuid}
$GuidArray = $GuidArray + $fileGuid
}
write-host "-------------------------------------------------------------" -ForegroundColor Yellow
$filepath = Read-Host " Please Enter File Path to Search"
for ($counter=0;$counter -lt $GuidArray.Count;$counter++){
$fileArray = #()
$guidcheck = $GuidArray[$counter]
$file = Get-ChildItem -Recurse -Force $filePath -ErrorAction SilentlyContinue | Where-Object { ($_.PSIsContainer -eq $false) -and ( $_.Name -like "*$guidcheck*") } | Select-Object Directory,Name| Format-Table -AutoSize
$fileArray += $file
}
Write-Output $fileArray
}
function CopyFiles {
param(
[string]$fileArray
)
for ($counter = 0;$counter -lt $fileArrray.Count;$counter++){
echo $fileArray[$counter]
#Copy-Item
}
}
function execute {
$filestore = Import-Excel 'C:\594 Sample of Filestore.xlsx'
echo $filestore
$fileArray = #(FindFiles($fileArray))
echo "test"
echo $fileArray
#CopyFiles($fileArray)
}

Answer 1

At the end of FindFiles add this line:
Write-Output $GuidArray
This returns that variable to the standard output stream (the pipeline).
Similarily at the end of FindFiles2 you need to do:
Write-Output $fileArray