Confirm existence of subdirectories - powershell

Question

I am writing a script to query a SQL server to aggregate data that I can use to search through various directories. If the folder does not exist it should write the path that does not exist to a text file at the end of the code.
I created an array to prefill the strings of the paths which are completed by using the SQL data. I'm coming into the issue of input sting was not in a correct format and the issue of it not correctly filling the text document. It will fill the text document with folders that both do and do not exist.
I have tried various configurations. I believe the array could be my issue but I am currently unsure.
Error is as follows:
Cannot convert value "Walker" to type "System.Int32". Error: "Input string was not in a correct format."
At \\cottonwood\users\C.B\My Documents\Untitled1.ps1:36 char:115
+ ... Address)#> + $($Row.'Last Name') + $array[$i]
+ ~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidArgument: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvalidCastFromStringToInteger
Code is as follows:
$SQLServer = "REDWOOD" #use Server\Instance for named SQL instances!
$SQLDBName = "MARS"
$SqlQuery = "select Account, IsActive, [Last Name] FROM vw_loans WHERE ( Account NOT IN ('100040A','100041A','100044A','100044B','100044C','100079A','100040A','100041A','100044A','100044B','100044C','100079A','100153B','100413B')) AND LEFT(Account,1)<>'_' AND (Account NOT like '%B%') AND (LoanStatus != 'PRELIM') ORDER BY Account"
$SqlConnection = New-Object System.Data.SqlClient.SqlConnection
$SqlConnection.ConnectionString = "Server = $SQLServer; Database = $SQLDBName; Integrated Security = True"
$SqlCmd = New-Object System.Data.SqlClient.SqlCommand
$SqlCmd.CommandText = $SqlQuery
$SqlCmd.Connection = $SqlConnection
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter
$SqlAdapter.SelectCommand = $SqlCmd
$DataSet = New-Object System.Data.DataSet
$SqlAdapter.Fill($DataSet)
$SqlConnection.Close()
clear
$DataSet.Tables[0]
$array = "\I. Originations\Final Originations Package","\II. Servicing\A. Communications", "\II. Servicing\B. Foreclosure Documents","\II. Servicing\C. Bankruptcy Documents", "\II. Servicing\D. Amendments & Extensions", "\II. Servicing\E. Property", "\II. Servicing\F. Previous Servicer Data", "\III. Loan Documents", "\IV. Taxes, Insurance, HOA\HOA", "\IV. Taxes, Insurance, HOA\Insurance","\IV. Taxes, Insurance, HOA\Insurance\PMI","\IV. Taxes, Insurance, HOA\Taxes"
foreach ($Row in $dataset.Tables[0].Rows)
{
for($i=0;$i -lt $array.Length; $i++)
{
if($Row.IsActive -eq $True)
{
$CorrPath = "U:\Shared\Loan Documents - Active\" + $($Row.Account) + " - " + <#$(Row.Address)#> + $($Row.'Last Name') + $array[$i]
}
if($Row.IsActive -eq $False)
{
$CorrPath = "U:\Shared\Loan Documents - Inactive\" + $($Row.Account) + " - " + <#$(Row.Address)#> + $($Row.'Last Name') + $array[$i]
}
$FileExist = Test-Path $CorrPath
If($FileExist -eq $False)
{Add-Content $Corrpath -Path "\\cottonwood\users\IT\Missing Folder Location\MissingSubFolders.txt"}
}
}

Answer 1

Looks to me like the parser is confused by what the + operator is supposed to be doing. It's trying to add when it should be concatenating. Try forcing everything to a string:
if($Row.IsActive) {
$CorrPath = "U:\Shared\Loan Documents - Active\" + $($Row.Account.ToString()) + " - " + <#$(Row.Address)#> + $($Row.'Last Name'.ToString()) + $array[$i].ToString()
} else {
$CorrPath = "U:\Shared\Loan Documents - Inactive\" + $($Row.Account.ToString()) + " - " + <#$(Row.Address)#> + $($Row.'Last Name'.ToString()) + $array[$i].ToString()
}
Or else try formatting the filename differently:
$CorrPath = "U:\Shared\Loan Documents - Active\{0} - {1}{2}" -f $Row.Account,$Row.'Last Name',$array[$i]