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Standalone HydraCALC (Location)
Description:
When running a calc, you first get this error indicating a number of possibilities.

Then the Pre-calc Questions window pops up with a warning.

But you go ahead with the calculation anyway and get this result
Your System Has a Deficit
System is -nan(ind) psi over the Water Supply Curve

System is being calc'd from a tank and water supply information was not entered correctly

When using a tank as your supply, the hydraulic calculation will stop at the pump discharge reference point. Do not include any reference points between the pump suction and the tank.

Also, make sure the connection, inlet, and outlet values are all the same