*SetSolverString()
Sets the value of the solver string.
Syntax
*SetSolverString(str_name, "str_label")
    Arguments
- str_name
 - The variable name of the solver string.
 - str_label
 - The descriptive label of the solver string.
 
Example
*SolverString(ss_solverstring, "Solver String Label")
*SetSolverString(ss_solverstring, "String to be used by solver")
    Context
Comments
This string can be referenced within the solver, such as passing a string into a user subroutine.