Merge branch 'master' into i91_gap_bar_waveformwidget

sohstationviewer/view/main_window.py

@@ -540,11 +540,14 @@ class MainWindow(QtWidgets.QMainWindow, UIMainWindow):
         else:
             self.min_gap = None
 
-        try:
-            check_chan_wildcards_format(self.mseed_wildcard_edit.text())
-        except Exception as e:
-            QtWidgets.QMessageBox.warning(self, "Incorrect Wildcard", str(e))
-            return
+        if self.mseed_wildcard_edit.text().strip() != '':
+            try:
+                check_chan_wildcards_format(self.mseed_wildcard_edit.text())
+            except Exception as e:
+                QtWidgets.QMessageBox.warning(
+                    self, "Incorrect Wildcard", str(e))
+                return
+
         try:
             del self.data_object
             self.processing_log = []

sohstationviewer/view/util/functions.py

@@ -170,7 +170,7 @@ def check_chan_wildcards_format(wildcards: str):
     :param wildcards: wildcards that are separated with ','.
     :type wildcards: str
     """
-    for wc in wildcards.split():
+    for wc in wildcards.split(','):
         wc = wc.strip()
 
         if len(wc) == 1 and wc != '*':