Zbigniew Romanowski

> Also, there's no point in setting presolve=on (as it's run by default) According to the [HiGHS documentation](https://ergo-code.github.io/HiGHS/dev/options/definitions/#option-presolve), for parameter `presolve`, the parameter `parallel` and the parameter `solver` there is...

> WARNING: Problem has some excessively small costs > WARNING: Problem has some excessively large column bounds > WARNING: Consider scaling the bounds by 1e-6, or setting the user_bound_scale option...

Setting the parameter `mip_rel_gap = 0` the output of the HiGHS is the following ``` Running HiGHS 1.12.0 (git hash: n/a): Copyright (c) 2025 HiGHS under MIT licence terms Set...

Setting the parameter `user_bound_scale = -10` the output is the following: ``` Running HiGHS 1.12.0 (git hash: n/a): Copyright (c) 2025 HiGHS under MIT licence terms Set option parallel to...

I have noticed that setting the value of parameter `mip_rel_gap = 0` and the value of parameter `mip_abs_gap = 1e-06`, for both `set user_bound_scale=-10` and `set user_bound_scale=-20`, the value of...

@jajhall In the context of issue #2664, should I close this issue? What is your suggestion?

### For the sake of completeness, the table below lists the objective value for various values of the HiGHS option `user_bound_scale`. - The column **HiGHS Log** contains links to the...

The table below lists the objective value for different [random_seed](https://ergo-code.github.io/HiGHS/dev/options/definitions/#random_seed) values of the HiGHS option in the range of `0` to `20`. Out of 21 cases, the error was only...

I confirm the inconsistent optimal solution for problem `map10`. Using the **HiGHS version 1.12**, and solving the non scaled problem [map10](https://miplib.zib.de/instance_details_map10.html) the objective value `-494.86468647` was obtained. The reference value...

Setting the HiGHS option `user_bound_scale = -7` and solving the scaled problem [map10](https://miplib.zib.de/instance_details_map10.html) the objective value `-495` was obtained, what is consistent with the reference value reported in the MIPLIB....