Index: gc_core/py/lang_core/gc_engine.py
==================================================================
--- gc_core/py/lang_core/gc_engine.py
+++ gc_core/py/lang_core/gc_engine.py
@@ -647,11 +647,11 @@
                 else:
                     # there is an anti-pattern
                     sPattern, sNegPattern = sRegex.split("¬", 1)
                     if sNegPattern and re.search(sNegPattern, dToken["sValue"]):
                         continue
-                    if re.search(sPattern, dToken["sValue"]):
+                    if not sPattern or re.search(sPattern, dToken["sValue"]):
                         if bDebug:
                             print("  MATCH: ~" + sRegex)
                         yield dGraph[dNode["<re_value>"][sRegex]]
         # regex morph arcs
         if "<re_morph>" in dNode:
@@ -672,11 +672,11 @@
                                 print("  MATCH: @" + sRegex)
                             yield dGraph[dNode["<re_morph>"][sRegex]]
                     else:
                         if sNegPattern and any(re.search(sNegPattern, sMorph)  for sMorph in _oSpellChecker.getMorph(dToken["sValue"])):
                             continue
-                        if any(re.search(sPattern, sMorph)  for sMorph in _oSpellChecker.getMorph(dToken["sValue"])):
+                        if not sPattern or any(re.search(sPattern, sMorph)  for sMorph in _oSpellChecker.getMorph(dToken["sValue"])):
                             if bDebug:
                                 print("  MATCH: @" + sRegex)
                             yield dGraph[dNode["<re_morph>"][sRegex]]
 
     def parse (self, dGraph, dPriority, sCountry="${country_default}", dOptions=None, bShowRuleId=False, bDebug=False, bContext=False):