## OPTI Toolbox v2.21 Released

Version 2.21 has just been released with minor updates. Changes include:

- Rebuilt all solvers against MKL v11.3 R3
- Fixed bug when nleq cannot accept x0 = zeros(n,1) during function testing (B. Duarte)
- Fixed bug where fixed binary variables were written as normal binary variables in MPS files
- Fixed bug where binary variables were not handled correctly by intlinprog
- Fixed bug where SNLE problems not handled correctly by MATLAB solvers
- Increased precision in writing MPS files
- Updated coinRead to correctly identify binary variables