Make error messages informative and useful

[ktbolt]

The error messages produced by svSolver are totally useless. A current user was having problems running on an HPC cluster with the svSolver job failing with the error message

****** Error occurred in routine <ctypes  >

  Error code :numtask  : ********

What could this possible mean to a user?

The problem was that the user was running svSolver using 96 processors which was exceeding the hard-coded maximum number of processes (25). The error message should state this and suggest a solution.

[ktbolt]

Another example from the same user

****** Error occurred in routine <restar  >
  Error code :nshg   r :        0

Looking through the svSolver source code I see that this message is not even being generated by the restar routine.