Epanet-Msx Error code 514

Hi everyone,

I am working on modeling monochloramine decay in Epanet-Msx. The network is the BWSN model with 12523 nodes, 14822 pipes, 2 reservoirs, 2 tanks, 4 pumps and 5 valves. The issue I face is when I run Epanet-msx on the network, the process stops and the Error code 514 is shown. The same doesn’t happen if I run the program on the same network but simplified (1 reservoir, no tanks, no pumps and valves), the analysis is completed successfully. I can’t understand it.

I would appreciate if anyone could help me, thanks

The error code was related to a pumping well with a negative demand.