Hi Jochen, when running an automation script as subscript you can return data to the main script via the AddScriptOutput.

Here an example of how I use it:
Subscript:
// Add data to be returned to main script.
engine.AddScriptOutput("PlmStorageJson", storageJson);
engine.AddScriptOutput("PlmError", error);

Mainscript:
var scriptOptions = _engine.PrepareSubScript("SLC_DOM Get Storage Data");
...
scriptOptions.StartScript();
Dictionary<string, string> result = scriptOptions.GetScriptResult();
string plmError = string.Empty;
string plmStorageJson = string.Empty;
result.TryGetValue("PlmError", out plmError);
result.TryGetValue("PlmStorageJson", out plmStorageJson);