AIMMS Knowledge Base Article – KB000012
Could not initialize DLL
You must have an AIMMS license that allows you the use of a solver, and a license for the solver in case you have a ‘link only’ license, before being able to use a solver in AIMMS.
When you try to add a solver in the solver configuration dialog, the following error message appears:
Could not initialize DLL libcpx91.dll
Where libcpx91.dll can also be any other solver DLL that is supported by AIMMS.
There are several possible causes for this problem:
- You have a license to use AIMMS with CPLEX, but the CPLEX solver files (.cpx) are out of maintenance.
- Your AIMMS license does not allow the use of this solver.
- you do have an AIMMS license with solver link, but the solver license is not setup correctly.
For the several causes there are different resolutions:
To update your CPLEX solver files, you can contact us at Support@aimms.com. Please, mention your license number(s) for which you need the new files. Note that your license must be in maintenance to update your solver files.
When you want to use a solver that is not yet supported by your AIMMS license, you need to upgrade your AIMMS license with a solver link (in case you already have a license to the solver), or with a solver.
If you have purchased an AIMMS license with ‘link-only’ you are able to use your own solver license in combination with AIMMS. Note, that CONOPT, XA, BARON and LGO cannot be used with link-only. To link the solver, please follow the steps described in how to link a solver to AIMMS.
For more information, please contact us at email@example.com.