Powershell To Export To CSV - powershell

Question

I have my method which (unless I did something stupid) worked perfectly yesterday for exporting to csv. However, today I keep getting this erro:
Exception calling "Fill" with "1" argument(s): "ExecuteReader: CommandText property has not been initialized"
$rowCount=$SqlAdapter.Fill($dt)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CategoryInfo : NotSpecified: (:) [], MethodInvocationException
FullyQualifiedErrorId : InvalidOperationException
And this is my syntax:
$server = "serverinstance"
$database = "databaseinstance"
$savefile = "C:\Test\sqlresults.csv"
$SelectQuery = "Select Top 1 * from madeuptable"
$connectionTemplate = "Data Source={0};Integrated Security=SSPI;Initial Catalog={1};"
$connectionString = [string]::Format($connectionTemplate, $server, $database)
$connection=New-Object System.Data.SqlClient.SqlConnection($connectionString)
$cmd=$connection.CreateCommand()
$cmd.CommandText = $SelectQuery
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter($cmd)
$dt = New-Object System.Data.DataTable
$rowCount=$SqlAdapter.Fill($dt)
if ($rowCount -gt 0) { $dt| Export-Csv $savefile -encoding UTF8 -NoTypeInformation }
$connection.Close()

Answer 1

Try creating the SqlDataAdaper using the query and the connection instead (and drop the cmd).
Example:
$SqlAdapter = new-object system.data.sqlclient.sqldataadapter ($SelectQuery, $connection)

Answer 2

I would check your $server and $database variables. I just ran your script against my own SQL server and it worked just fine for me.
EDIT:
Here is what I ran:
$server = "FAR-L2484\HOLDER_SQL" ## Hostname\InstanceID
$database = "MASTER"
$savefile = "C:\Test\sqlresults.csv"
$SelectQuery = "SELECT * FROM information_schema.tables"
$connectionTemplate = "Data Source={0};Integrated Security=SSPI;Initial Catalog={1};"
$connectionString = [string]::Format($connectionTemplate, $server, $database)
$connection=New-Object System.Data.SqlClient.SqlConnection($connectionString)
$cmd=$connection.CreateCommand()
$cmd.CommandText = $SelectQuery
$SqlAdapter = New-Object System.Data.SqlClient.SqlDataAdapter($cmd)
$dt = New-Object System.Data.DataTable
$rowCount=$SqlAdapter.Fill($dt)
$dt| Export-Csv $savefile -encoding UTF8 -NoTypeInformation
$connection.Close()
and this is what I got in C:\test\sqlresults.csv
"TABLE_CATALOG","TABLE_SCHEMA","TABLE_NAME","TABLE_TYPE"
"master","dbo","spt_fallback_db","BASE TABLE"
"master","dbo","spt_fallback_dev","BASE TABLE"
"master","dbo","spt_fallback_usg","BASE TABLE"
"master","dbo","spt_values","VIEW"
"master","dbo","spt_monitor","BASE TABLE"
"master","dbo","MSreplication_options","BASE TABLE"