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
@@ -404,11 +404,11 @@
     lMorph = dTokenPos[tWord[0]]["lMorph"]  if tWord[0] in dTokenPos and "lMorph" in dTokenPos[tWord[0]]  else _oSpellChecker.getMorph(tWord[1])
     if not lMorph:
         return False
     zPattern = re.compile(sPattern)
     if bStrict:
-        return all(zPattern.search(s)  for s in lMorph)
+        return bool(lMorph) and all(zPattern.search(s)  for s in lMorph)
     return any(zPattern.search(s)  for s in lMorph)
 
 
 def morphex (dTokenPos, tWord, sPattern, sNegPattern, bNoWord=False):
     "analyse a tuple (position, word), returns True if not sNegPattern in word morphologies and sPattern in word morphologies (disambiguation on)"
@@ -431,11 +431,11 @@
     lMorph = _oSpellChecker.getMorph(sWord)
     if not lMorph:
         return False
     zPattern = re.compile(sPattern)
     if bStrict:
-        return all(zPattern.search(s)  for s in lMorph)
+        return bool(lMorph) and all(zPattern.search(s)  for s in lMorph)
     return any(zPattern.search(s)  for s in lMorph)
 
 
 def analysex (sWord, sPattern, sNegPattern):
     "analyse a word, returns True if not sNegPattern in word morphologies and sPattern in word morphologies (disambiguation off)"
@@ -668,14 +668,16 @@
                     else:
                         # there is an anti-pattern
                         sPattern, sNegPattern = sRegex.split("¬", 1)
                         if sNegPattern == "*":
                             # all morphologies must match with <sPattern>
-                            if sPattern and all(re.search(sPattern, sMorph)  for sMorph in _oSpellChecker.getMorph(dToken["sValue"])):
-                                if bDebug:
-                                    print("  MATCH: @" + sRegex)
-                                yield dGraph[dNode["<re_morph>"][sRegex]]
+                            if sPattern:
+                                lMorph = _oSpellChecker.getMorph(dToken["sValue"])
+                                if lMorph and all(re.search(sPattern, sMorph)  for sMorph in lMorph):
+                                    if bDebug:
+                                        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 not sPattern or any(re.search(sPattern, sMorph)  for sMorph in _oSpellChecker.getMorph(dToken["sValue"])):
                                 if bDebug:
@@ -1006,10 +1008,12 @@
             return False
     # check negative condition
     if sNegPattern:
         if sNegPattern == "*":
             # all morph must match sPattern
+            if not lMorph:
+                return False
             zPattern = re.compile(sPattern)
             return all(zPattern.search(sMorph)  for sMorph in lMorph)
         else:
             zNegPattern = re.compile(sNegPattern)
             if any(zNegPattern.search(sMorph)  for sMorph in lMorph):
@@ -1030,10 +1034,13 @@
     if not lMorph:
         return False
     # check negative condition
     if sNegPattern:
         if sNegPattern == "*":
+            # all morph must match sPattern
+            if not lMorph:
+                return False
             zPattern = re.compile(sPattern)
             return all(zPattern.search(sMorph)  for sMorph in lMorph)
         else:
             zNegPattern = re.compile(sNegPattern)
             if any(zNegPattern.search(sMorph)  for sMorph in lMorph):