Multiple parameter in powershell - powershell

Question

I have a powershell script to call the SP which is shown below
$sqlTableConnection = New-Object [System.Data.SqlClient.SqlConnection]("Server=1xx.xx.xxx; Database=dbName; Integrated Security= True");
$sqlTableCmd = New-Object [System.Data.SqlClient.SqlCommand]
$sqlTableCmd.CommandText = "[System_Control].[usp_Check_system]"
$sqlTableCmd.Connection = $sqlTableConnection;
$jobName1 = "MASTER_JOB";
$sqlTableCmd.Parameters.AddWithValue("#JobName", $jobName1) ;
$outParameter = new-object System.Data.SqlClient.SqlParameter;
$outParameter.ParameterName = "#JobSatatus";
$outParameter.Direction = [System.Data.ParameterDirection]'Output';
$outParameter.DbType = [System.Data.DbType]'Boolean';
$sqlTableCmd.Parameters.Add($outParameter) ;
$sqlTableCmd.Connection = $sqlTableConnection
$sqlTableConnection.Open();
$sqlTableCmd.ExecuteNonQuery();
$truth = $sqlTableCmd.Parameters["#JobSatatus"].Value;
$sqlTableConnection.Close();
$truth;
but when I am running this I am getting below error
Exception calling "ExecuteNonQuery" with "0" argument(s): "The variable name '#
JobName' has already been declared. Variable names must be unique within a quer
y batch or stored procedure."
At line:15 char:33
+ $sqlTableCmd.ExecuteNonQuery <<<< ();
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
Where I am doing mistake?

Answer 1

You should only be getting that error if you aren't re-initializing the SqlCommand object and so it has #JobName already defined.
I suspect you are getting this when you run it manually, not when you execute the script as a whole..
OR, if you are seeing it all the time, then maybe you moved this code into a function but the original $sqlTableCmd was initialized in the main code and now when this executes, it is in a different scope, but is getting confused by the one that was defined in the higher scope?
As I understand it, this line here is the one that should be setting things up fresh for you:
$sqlTableCmd = New-Object [System.Data.SqlClient.SqlCommand]