wowgarmin

Anyway, I can reproduce this with the following snippet [in a simple data field]:
import Toybox.Activity;
import Toybox.Position;
//... (note that Toybox.Sensor is not imported)

class TestDataFieldView extends WatchUi.SimpleDataField {
//...
  var _posInfo as Null or Position.Info;
  function compute(info) as Numeric or Duration or String or Null {
    var altitude = (_posInfo as Position.Info).altitude; // <=====

If I build the project normally, the line with "var altitude" does not produce the error mentioned above. If I then make a change to that line and revert the change [without rebuilding the project], I get the following error:

fr165: 'Info' is ambiguious and exists in multiple imported modules [$.Toybox.Position.Info, $.Toybox.Activity.Info].

This does suggest that the regular build process and the language server build process work slightly differently.

Not to state the obvious, but "ambiguious" is a misspelling of "ambiguous".