- fix mca list when it is empty

id01/scripts/kmap.py

@@ -716,26 +716,28 @@ def _add_detectors(
     # XMAP
     # ==================================================================
     l_mca = kmap_dict.get("mca", [])
-    for node in builder.get_nodes_by_controller_type(BaseMCA):
 
-        mca = node.controller
-        assert mca in l_mca
+    if l_mca != []:
+        for node in builder.get_nodes_by_controller_type(BaseMCA):
 
-        _log.debug(f"\n... add detectors / mca [{mca.name}]")
+            mca = node.controller
+            assert mca in l_mca, f"mcaCtrl [{mca}] is not in l_mca [{l_mca}]" 
 
-        mca_params = {}
-        mca_params["npoints"] = nb_points
-        mca_params["trigger_mode"] = McaAcquisitionSlave.GATE
+            _log.debug(f"\n... add detectors / mca [{mca.name}]")
 
-        if not xmap_save_spectra:
-            node._counters = [
-                c for c in node._counters if c.name.find("spectrum") == -1
-            ]
+            mca_params = {}
+            mca_params["npoints"] = nb_points
+            mca_params["trigger_mode"] = McaAcquisitionSlave.GATE
 
-        node.set_parameters(acq_params=mca_params)
-        chain.add(top_master, node)
+            if not xmap_save_spectra:
+                node._counters = [
+                    c for c in node._counters if c.name.find("spectrum") == -1
+                ]
+
+            node.set_parameters(acq_params=mca_params)
+            chain.add(top_master, node)
 
-        mcas.add(mca)
+            mcas.add(mca)
 
     builder.print_tree(not_ready_only=False)