{"id":180767,"date":"2021-06-07T13:44:12","date_gmt":"2021-06-07T13:44:12","guid":{"rendered":"\/forum\/forums\/reply\/180767\/"},"modified":"2021-06-07T13:44:12","modified_gmt":"2021-06-07T13:44:12","slug":"180767","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/180767\/","title":{"rendered":"Reply To: Issue starting Lumerical FDTD via Python API"},"content":{"rendered":"<p>We have the same problem with MODE SOLUTION (Version 2021), it reports <br \/>\n&#8220;LumApiError: &#8216;appOpen error: \\n Failed to start messaging, check licenses&#8230;'&#8221; <br \/>\nWe previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. <br \/>\nThe MODE Solution window actually opens properly. It is just that it does not return the proper handle back to Python, and thus we can not continue from the Python script.<\/p>\n","protected":false},"template":"","class_list":["post-180767","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"We have the same problem with MODE SOLUTION (Version 2021), it reports &quot;LumApiError: &#039;appOpen error: \\n Failed to start messaging, check licenses...&#039;&quot; We previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. It is just that it\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/180767\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Reply To: Issue starting Lumerical FDTD via Python API | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"We have the same problem with MODE SOLUTION (Version 2021), it reports &quot;LumApiError: &#039;appOpen error: \\n Failed to start messaging, check licenses...&#039;&quot; We previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. It is just that it\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/180767\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-06-07T13:44:12+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-06-07T13:44:12+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Issue starting Lumerical FDTD via Python API | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"We have the same problem with MODE SOLUTION (Version 2021), it reports &quot;LumApiError: &#039;appOpen error: \\n Failed to start messaging, check licenses...&#039;&quot; We previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. It is just that it\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/180767\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/180767\\\/#listItem\",\"name\":\"Reply To: Issue starting Lumerical FDTD via Python API\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/180767\\\/#listItem\",\"position\":2,\"name\":\"Reply To: Issue starting Lumerical FDTD via Python API\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/180767\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/reply\\\/180767\\\/\",\"name\":\"Reply To: Issue starting Lumerical FDTD via Python API | Ansys Learning Forum\",\"description\":\"We have the same problem with MODE SOLUTION (Version 2021), it reports \\\"LumApiError: 'appOpen error: \\\\n Failed to start messaging, check licenses...'\\\" We previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. 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It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. 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It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. 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It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. It is just that it","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/180767\/","article:published_time":"2021-06-07T13:44:12+00:00","article:modified_time":"2021-06-07T13:44:12+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Issue starting Lumerical FDTD via Python API | Ansys Learning Forum","twitter:description":"We have the same problem with MODE SOLUTION (Version 2021), it reports &quot;LumApiError: 'appOpen error: \\n Failed to start messaging, check licenses...'&quot; We previously used 2019b and 2020a, and did not have this issue. It only came up when we upgraded to 2021. The MODE Solution window actually opens properly. 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