Return the value of a variable at a given time in the simulation results.
Works on the filename pointed to by the scripting variable currentSimulationResult or a given filename.
For parameters, any time may be given. For variables the startTime<=time<=stopTime needs to hold.
On error, nan (Not a Number) is returned and the error buffer contains the message.
function val input VariableName var; input Real timePoint = 0.0; input String fileName = "<default>" "The contents of the currentSimulationResult variable"; output Real valAtTime; end val;