diff --git a/pbma.m b/pbma.m
index 263e287..5e41d0b 100644
--- a/pbma.m
+++ b/pbma.m
@@ -122,9 +122,11 @@
                 ppindices(find(exponents(ii,:)))=ii;
             end
         end
-        ppindices(ppindices==0)=[];  % keep only indices of pure powers in B
         
         for ii=1:length(ppindices)
+            
+            if ppindices(ii) ~= 0
+            
             % determine connected components for each pure power in B
             connected = b(ppindices(ii));
             index=ppindices(ii);
@@ -153,6 +155,7 @@
                 satisfied=0;
                 break;
             end
+            end
         end
         
         function isc=isconnected(connected,index,n)