Run Time Error 11 - Pipework sizing

Question

I have a run time error 11 appearing when sizing heating pipework in netsys. I had previously sized the system with no issue, however made some amendments and when re-running it the error has appeared. 
 Could anyone assist as I currently can't access the results of the system sizing for an urgent project. 
 
 Regards 
 
 Phil

Shane Regan · Answer

Hi Philip, 
 Thanks for the tip. I found that the error is actually due to the floor change connector between Floor -1 and Floor 0. 
 Please go to Floor -1, and use Pipes > Group delete, to delete the connecter and associated riser. 
 Then, go to Floor 0 and do the same where the same connector appears on that floor. 
 You should then re-enter the connector as shown here. 
 Or if you need I can send over the working model, just let me know.