basic FC reading is working for different script version

src/gui_qt/data/datawidget/datawidget.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+from nmreval.lib.logger import logger
 from nmreval.lib.colors import available_cycles
 
 from .properties import PropWidget
@@ -356,7 +357,10 @@ class DataTree(QtWidgets.QTreeWidget):
                 except AttributeError:
                     idx = self.invisibleRootItem().indexOfChild(item)
                     self.invisibleRootItem().takeChild(idx)
-                    self._checked_graphs.remove(_id)
+                    try:
+                        self._checked_graphs.remove(_id)
+                    except KeyError:
+                        logger.warn(f'Graph {_id} already removed, skip')
 
             iterator += 1
 

src/gui_qt/io/fcbatchreader.py

@@ -54,6 +54,7 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
             infiles = QtWidgets.QFileDialog.getExistingDirectory(caption='Select input directory',
                                                                  directory=str(self.path),
                                                                  options=QtWidgets.QFileDialog.ShowDirsOnly)
+            infiles = [infiles] if infiles else infiles
 
         if infiles:
             self.listWidget.addItems(infiles)