Included Diffcalc commands to the API of diffutils, and adapted to latest version.

src/main/java/ch/psi/mxsc/Controller.java

@@ -226,8 +226,14 @@ public class Controller {
             try {
                 currentMountedSample = (String) Context.getInstance().evalLineBackground("get_setting('mounted_sample_position')");
                 Sample sample = basePlate.getSampleByName(currentMountedSample);
+                if ((sample == null) && (roomTemperatureBasePlate!=null)){
+                    sample = roomTemperatureBasePlate.getSampleByName(currentMountedSample);
+                    roomTemperatureBasePlate.resetLoadedSample();
+                }
                 basePlate.resetLoadedSample();
-                sample.setLoaded(true);
+                if (sample != null) {
+                    sample.setLoaded(true);
+                }
             } catch (Exception ex) {
                 currentMountedSample = null;
                 basePlate.resetLoadedSample();