Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum please send a message via our contact form. › Forums › OpenLB › General Topics › heatmap throw an error › Reply To: heatmap throw an error May 22, 2020 at 3:32 pm #4976 iJokerifyParticipant Dear Mathias, yes, i saw it. What could be reason for this? Grateful, Sergey