Hi,
When calling lpx_warm_up(lp), I got the following message:
Assertion failed: ret != ret; file glplpx7.c; line 557
In this file, we have:
ret = lpx_invert(lp);
switch (ret)
{ case 0:
ret = LPX_E_OK;
break;
case 1:
case 2:
ret = LPX_E_SING;
goto done;
default:
insist(ret != ret);
}
In my case, ret was equal to 3. Considering the comments above the function:
-- The routine lpx_warm_up returns one of the following exit codes:
--
-- LPX_E_OK the LP basis has been successfully "warmed up".
--
-- LPX_E_EMPTY the problem has no rows and/or columns.
--
-- LPX_E_BADB the LP basis is invalid, because the number of basic
-- variables is not the same as the number of rows.
--
-- LPX_E_SING the basis matrix is singular or ill-conditioned. */
and considering the contents of the function lpx_invert, I think that,
in my case, the function lpx_warm_up should have returned with value
LPX_E_BADB, instead of terminating abruptly.
Regards,
Bernard Helmstetter
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