diff --git a/a2p_MuxAssembly.py b/a2p_MuxAssembly.py
index 2f1c1a9b..65dd1a67 100644
--- a/a2p_MuxAssembly.py
+++ b/a2p_MuxAssembly.py
@@ -138,7 +138,11 @@ def muxAssemblyWithTopoNames(doc, withColor=False):
                     faceColors.append(diffuseCol[i])
 
     shell = Part.makeShell(faces)
-    solid = Part.Solid(shell)
+    try:
+        solid = Part.Solid(shell)
+    except:
+        # keeping a shell if solid is failing
+        solid = shell
     if withColor:
         return muxInfo, solid, faceColors
     else:
diff --git a/a2p_topomapper.py b/a2p_topomapper.py
index 0117e406..a5b0be16 100644
--- a/a2p_topomapper.py
+++ b/a2p_topomapper.py
@@ -500,7 +500,11 @@ def createTopoNames(self,withColor=False):
                         faceColors.append(diffuseCol[i])
 
         shell = Part.makeShell(faces)
-        solid = Part.Solid(shell)
+        try:
+            solid = Part.Solid(shell)
+        except:
+            # keeping a shell if solid is failing
+            solid = shell
         #-------------------------------------------
         # if toponaming is used, assign toponames to
         # shells geometry