{"id":964,"date":"2016-09-06T15:58:08","date_gmt":"2016-09-06T13:58:08","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=964"},"modified":"2017-12-05T09:19:57","modified_gmt":"2017-12-05T08:19:57","slug":"solution-erreur-dun-etudiant","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/auto-formation\/sequence1\/cours2-introduction-a-gams\/lecon8\/erreur-dun-etudiant\/solution-erreur-dun-etudiant\/","title":{"rendered":"Solution &#8211; Erreur d&rsquo;un \u00e9tudiant"},"content":{"rendered":"<p>La solution en image :\u00a0 <a href=\"http:\/\/www.supagro.fr\/ModelEco\/autres\/var2_correction.wmv\" rel=\"attachment wp-att-935\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/05\/video.png\" alt=\"\" width=\"70\" height=\"79\" \/><\/a><\/p>\n<p>Quand on ex\u00e9cute le mod\u00e8le, aucun message d\u2019erreur n\u2019apparait. Mais on peut voir que dans process windows, il est \u00e9crit que le model n\u2019est pas born\u00e9. En allant dans le fichier .lst on voit dans SOLVE SUMMARY que le statut du mod\u00e8le est Unbounded, plus bas, on peut voir un message d\u2019erreur,<\/p>\n<p>**** ERRORS\/WARNINGS IN EQUATION TERRE<\/p>\n<p>1 error(s): Unbounded equation (slack variable)<\/p>\n<p>Et dans les \u00e9quations, il est \u00e9crit UNBND.<\/p>\n<p>Ce probl\u00e8me correspond en fait au probl\u00e8me de r\u00e9gions admissibles non born\u00e9 que nous avons vu dans la premi\u00e8re s\u00e9quence. On voit en effet que le signe de l\u2019in\u00e9galit\u00e9 a \u00e9t\u00e9 invers\u00e9, on a =g= alors qu\u2019on devrait avoir =l=. Si on change et on ex\u00e9cute de nouveau, on voit que le probl\u00e8me est r\u00e9solu.<\/p>\n<p><span style=\"text-decoration: underline\">Conclusion<\/span> : Ne pas avoir de message d&rsquo;erreur en GAMS ne garantie pas que votre mod\u00e8le est juste.<\/p>\n<p><a href=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/auto-formation\/sequence1\/cours2-introduction-a-gams\/qq-exercices-supplementaires\/erreur-dun-etudiant\/\" rel=\"attachment wp-att-829\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-829\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/08\/retourAlEnonce.png\" alt=\"retourAlEnonce\" width=\"186\" height=\"60\" \/><\/a><a href=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/sommaire-du-cours\/sequence1\/cours2-introduction-a-gams\/\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/07\/retourAuSommaireDuCours.png\" alt=\"retourAuSommaireDuCours\" width=\"208\" height=\"65\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La solution en image :\u00a0 Quand on ex\u00e9cute le mod\u00e8le, aucun message d\u2019erreur n\u2019apparait. Mais on peut voir que dans process windows, il est \u00e9crit que le model n\u2019est pas born\u00e9. En allant dans le fichier .lst on voit dans <a class=\"more-link\" href=\"https:\/\/www.supagro.fr\/wordpress\/modeleco\/auto-formation\/sequence1\/cours2-introduction-a-gams\/lecon8\/erreur-dun-etudiant\/solution-erreur-dun-etudiant\/\">Continuer la lecture <span class=\"screen-reader-text\">  Solution &#8211; Erreur d&rsquo;un \u00e9tudiant<\/span><span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":953,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-964","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/pages\/964","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/users\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/comments?post=964"}],"version-history":[{"count":20,"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/pages\/964\/revisions"}],"predecessor-version":[{"id":3735,"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/pages\/964\/revisions\/3735"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/pages\/953"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modeleco\/wp-json\/wp\/v2\/media?parent=964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}