if (numBlocksL != numBlocks or numBlocksL <= 0 or numBlocks <= 0) :
            # blocks out of sync, stop and take it from the top
            if (self.debugLevel >= LowDebug) :
                self.msgText("Block lists out of sync! Blocks: " + str(numBlocks) + " Listeners: " + str(numBlocksL))
            self.doHalt()