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src/dsb/com/cnd3b/utility/polyv/Polyv.java

@@ -298,7 +298,10 @@ public class Polyv extends BaseClass {
             if ("".equals(channelIds)) {
                 channelIds = channelId;
             } else {
-                channelIds = channelIds + "," + channelId;
+                if(!channelId.equals("null")){
+                    channelIds = channelIds + "," + channelId;
+                }
+
             }
         }
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