# Issues with exportModel in amplpy **URL:** \ **Category:** Support\ **Tags:** errors-and-messages\ **Created:** [May 29, 2023, 4:36pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581 "2023-05-29T16:36:39Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Jonathan](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/jonathan/32/313_2.png) [@Jonathan](https://discuss.ampl.com/u/Jonathan)\ **Post date:** [May 29, 2023, 4:36pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/1 "2023-05-29T16:36:39Z")
Hi! I am implementing some callbacks to the solver using amplpy in Jupyter notebook, and I’m having some strange problems with exportModel. The respective code line is: ampls\_model=ampl.exportModel(solver,[“return\_mipgap=5”]) #My base solver is CPLEX Since I work from different places, I use until 3 machines for that. So, in the first machine that line works well, while in the second one I get the following error: TypeError: AMPL.export\_model() takes 2 positional arguments but 3 were given And, in the third machine that line works well with CPLEX but get the previous error when I switched the solver to Gurobi. Any ideas of the root of the issue, and how to avoid it?, please Thanks in advance ---
**Author:** ![fdabrandao](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/fdabrandao/32/63_2.png) [@fdabrandao](https://discuss.ampl.com/u/fdabrandao)\ **Post date:** [May 29, 2023, 5:13pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/2 "2023-05-29T17:13:39Z")
Hi @Jonathan, Thanks for reporting this issue. There was a release of amplpy-cplex last week that by mistake did not include the options in the export functions. Could you please try installing the previous `pip install amplpy-cplex==0.1.0b18 --upgrade` and see if the problem persists? We should release amplpy-cplex again in a few days with the options as second argument like before. ---
**Author:** ![fdabrandao](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/fdabrandao/32/63_2.png) [@fdabrandao](https://discuss.ampl.com/u/fdabrandao)\ **Post date:** [June 5, 2023, 1:41pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/3 "2023-06-05T13:41:13Z")
Hi @Jonathan, amplpy\_cplex and amplpy\_gurobi v0.1.2 have just been released and export model has options again. Note, however, that the method exportModel is now called to\_ampls, so after upgrading you should update your code to: ```python ampls_model = ampl.to_ampls(solver, ["return_mipgap=5"]) ``` ---
**Author:** ![Jonathan](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/jonathan/32/313_2.png) [@Jonathan](https://discuss.ampl.com/u/Jonathan)\ **Post date:** [June 5, 2023, 8:21pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/4 "2023-06-05T20:21:19Z")
Hi Filipe, Thanks a lot for your effort to update the amplpy\_gurobi. Everything is going well now. ---
**Author:** ![Jonathan](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/jonathan/32/313_2.png) [@Jonathan](https://discuss.ampl.com/u/Jonathan)\ **Post date:** [June 8, 2023, 9:42pm UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/5 "2023-06-08T21:42:57Z")
Hi Filipe, Sorry to add a new problem. After using ampls\_model = ampl.to\_ampls(solver, [“return\_mipgap=5”]), my routine callback.setCurrentGap() doesn’t work because the command “setAMPLsParameter” is not recognized anymore. So, I thought that the command changed its name to “setAMPLParameter”, but it doesn’t work either. Please, can you tell me if there is a new command for that? My callback.setCurrentGap() routine: def setCurrentGap(self): gaptolpct = 100\*self.\_stoprule[‘gaptol’][self.\_current] stopnodes = self.\_stoprule[‘nodes’][self.\_current] print(“Increasing gap tolerance to " f”{gaptolpct:.2f}% after {stopnodes:.1f} nodes") ampls\_model.setAMPLsParameter(ampls.SolverParams.DBL\_MIPGap, self.\_stoprule[‘gaptol’][self.\_current]) self.\_current += 1 Thanks _Atte._ ---
**Author:** ![mapgccv](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/mapgccv/32/17_2.png) [@mapgccv](https://discuss.ampl.com/u/mapgccv)\ **Post date:** [June 13, 2023, 10:17am UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/6 "2023-06-13T10:17:09Z")
Hi Johnatan, I am Christian, principal developer of the ampls libs. I am investigating this, will let you know shortly. Thanks to you for all your feedback and for coping with us as we restructure the libs. Christian ---
**Author:** ![mapgccv](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.ampl.com/mapgccv/32/17_2.png) [@mapgccv](https://discuss.ampl.com/u/mapgccv)\ **Post date:** [June 15, 2023, 5:15am UTC](https://discuss.ampl.com/t/issues-with-exportmodel-in-amplpy/581/7 "2023-06-15T05:15:09Z")
Hi again, took me a bit to track it down to the technique we use to be able to use native Python enums in place of C ones. A fix i in progress but i will not be able to release it today. In the meantime, you could use the function setAMPLParameter with the enumeration value, on the lines of: ```auto model.setAMPLParameter(ampls.SolverParams.DBL_MIPGap.value, gapvalue) ``` Note that the code above will continue working even after the fix; I will keep you posted on the next release.