powershell script can't find a file that exists - powershell

Question

I have this script that creates files using bcp. As BCP doesn't export data with header i need to join both files into. If i run the code in another script it creates the csv file but if i run this script it fails saying files DOES NOT EXIST, that is the last section of the script below (#THE PROBLEM STARTS HERE).
Appreciate any help.
Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"
$PSDefaultParameterValues['*:ErrorAction']='Stop'
$bcp = 'c:\Program Files\Microsoft SQL Server\100\Tools\Binn\bcp.exe'
$delimiter = '","'
$server = 'BLABLABLA'
$database = 'DMB'
$schema = '.dbo.'
$dbschema = $database + $schema
$atresult = "#result"
$commas = " + ',','') + "
$head1 = 'Use '
$head2 = ' Declare ' # atresult
$head3 = ' varchar(max) select ' # atresult
$head4 = ' = COALESCE(' #atresult $commas
$head5 = 'COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ' # tablename
$head6 = ' select ' #atresult
$tables = #('EntityTypes_20181205','FieldFieldTypeInfo')
$output_path = 'D:\Temp\DataModelBuild\'
# Deletes any file in Destination Folder
#if ( (Get-ChildItem $output_path | Measure-Object).Count -ne 0) {}
Get-ChildItem -Path $output_path -Include *.* -File -Recurse | foreach { $_.Delete()}
foreach ($element in $tables)
{
# GET COLUMN NAMES into header file
$outputFile = $output_path + $element + ".header"
$NQ = '"' + $head1 + $database + $head2 + $atresult + $head3 + $atresult + $head4 + $atresult + $commas + $head5 + ''' + $element + ''' + $head6 + $atresult + '"'
#$arglist = "(" + $NQ + " queryout " + $outputFile + ", -S " + $server + " -T -t" + $delimiter + " -c -k)"
$arglist = #('"',
$head1,
$database,
$head2,
$atresult,
$head3,
$atresult,
$head4,
$atresult,
$commas,
$head5,
"'$element'",
$head6,
$atresult,
'"',
" queryout $outputFile",
"-S $server -T -t$delimiter -c -k")
#write-output $arglist
Start-Process -FilePath $bcp -ArgumentList $arglist
#Read-Host
# GET DATA into data file
$outElement = $dbschema + "[" + $element + "]"
$outputFile = $output_path + $element + ".data"
$arglist = #($outElement, "out $outputFile", "-S $server -T -t$delimiter -c -k")
Start-Process -FilePath $bcp -ArgumentList $arglist
#write-output $arglist
#Read-Host
# Merge header and data to csv
#Invoke-Expression "&'$ExtPs1' -FilePath $output_path -FileName $element"
#Write-Output "call "
#Invoke-Expression "&'D:\idna\PedroTemp\cp2csv.ps1' $output_path $element"
#Read-Host
#THE PROBLEM STARTS HERE
$File1 = #("$output_path$element.header")
$File2 = #("$output_path$element.data")
$File3 = #("$output_path$element.csv")
write-output $File1, $File2, $File3
If (-not (Test-Path -Path $File1)) {
Write-Error "File DOES NOT EXIST '$File1'" -ErrorAction Stop
} else {
Write-Host "File EXIST"
}
Add-Content $File3 -value (Get-Content $File1)
Add-Content $File3 -value (Get-Content $File2)
#write-output $File1, $File2, $File3 -ErrorAction Stop
Read-Host
}
My question is why isn't the script detecting the file?
Is there any problem with the string?

Answer 1

The strings for the pathes aren't build correctly. When you use a member in a string you have to enclose the variable and the member with $().
$File1 = "$output_path$($element.header)"