Forum Discussion
Error: Unexpected failure accessing global file / no available space on data medium
Hi everyone, I try to solve a huge capacitated facility location problem. After the run time of 2 days and still no optimal solution the following error occurred: ?45 Error: Unexpected failure acces...
Hi Yvonne,
when the search tree gets too large, Xpress optimizer starts swapping out data to disk to avoid out of memory situations.
One way to solve your problem would be to forbid this swapping and also set a maximum memory limit. If that limit is hit then the optimizer exits gracefully, just as if a time limit, node limit, ... is hit.
The MAXMEMORYHARD control allows limiting the total amount of memory Xpress will allocate.
The TREEMEMORYLIMIT control tells the optimizer when to start swapping out to disk. If you set this to a very large value (like 2147483647, the maximum signed integer) then no swapping to disk should happen.