NegativeWeightException Constructor (Int32, Int32, Double)

A negative weight was encountered.

public NegativeWeightException(
   int rowIndex,
   int invocation,
   double val
);

rowIndex: An int which specifies the row index of X for which the weight is negative.
invocation: An int which specifies the invocation number at which the error occurred. A 3 would indicate that the error occurred on the third invocation.
val: An double which represents the value of the weight encountered.