Hi @Punit Shah 

Use the method LinkToFile below a example.

C:\temp before create the file:

Execute the code

Set file = ##Class(%Stream.FileBinary).%New()
Set statusCode = file.LinkToFile("c:\temp\test_file.txt")
If ($System.Status.IsError(statusCode))
{
  Do $System.Status.DisplayError(statusCode)
  Return
}
Do file.WriteLine($ListBuild("Some bin data"))
Write $System.Status.DisplayError(file.%Save())

After execution:

• only uninstall option is the unattended section at https://docs.intersystems.com/ens201817/csp/docbook/DocBook.UI.Page.cls?...

You can use add or remove programs too.

• would I be correct to interpret 'CacheC' in the example command as the instance name of the Ensemble installation to be uninstalled? Or is that the folder name on the filesystem where it is in installed?

Is the instance name.

• Not familiar with Windows Registry editing, so can I safely delete those two trees in the registry if i want a completely fresh start?

After uninstall and if you have only one installation yes.
 

Hi Pedro,

You can retrieve this information querying the class %Dictionary.PropertyDefinition.

An example:

SELECT Name
FROM %Dictionary.PropertyDefinition
WHERE parent = "mypackage.MyClassName"

The field parent is fully qualified name of the class that you want to list properties name. 

HI @Freddy Baier 

You can change your query, given alias to the columns:

SELECT id,room,client->name as ClientName,functionary->name as FunctionaryName FROM rooms ORDER BY id

Then in COS you access the columns by name:

Write rs.%Get("ClientName")
Write rs.%Get("FunctionaryName")