{"id":307556,"date":"2023-09-20T07:43:07","date_gmt":"2023-09-20T07:43:07","guid":{"rendered":"\/forum\/forums\/reply\/307556\/"},"modified":"2023-09-20T07:43:07","modified_gmt":"2023-09-20T07:43:07","slug":"307556","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/307556\/","title":{"rendered":"Reply To: Issue starting Lumerical FDTD via Python API"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;I am facing the similar situation of ocassionally being unable to open FDTD file using python api in the ubuntu linux server. I run the python code in a seperate python IDE other than built-in python version. When my python code opens FDTD file at first time, it normally opens the file, however, when python code open FDTD files sequentially, Opening error usually occurs.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;python code in cmd&nbsp;&lt;\/p&gt;&lt;p&gt;&gt;&gt;&gt; from importlib.machinery import SourceFileLoader&lt;br&gt;&gt;&gt;&gt; api_path = &#8220;\/opt\/lumerical\/v231\/api\/python\/lumapi.py&#8221;&lt;br&gt;&gt;&gt;&gt;&nbsp;&lt;br&gt;&gt;&gt;&gt; lumapi = SourceFileLoader(&#8220;lumapi&#8221;, api_path).load_module()&lt;br&gt;&gt;&gt;&gt; fdtd = lumapi.FDTD(hide =True)&lt;br&gt;Traceback (most recent call last):&lt;br&gt;&nbsp; File &#8220;&lt;stdin&gt;&#8221;, line 1, in &lt;module&gt;&lt;br&gt;&nbsp; File &#8220;\/opt\/lumerical\/v231\/api\/python\/lumapi.py&#8221;, line 1394, in __init__&lt;br&gt;&nbsp; &nbsp; super(FDTD, self).__init__(&#8216;fdtd&#8217;, filename, key, hide, serverArgs, **kwargs)&lt;br&gt;&nbsp; File &#8220;\/opt\/lumerical\/v231\/api\/python\/lumapi.py&#8221;, line 1112, in __init__&lt;br&gt;&nbsp; &nbsp; self.handle = open(product, key, hide, serverArgs)&lt;br&gt;&nbsp; File &#8220;\/opt\/lumerical\/v231\/api\/python\/lumapi.py&#8221;, line 242, in open&lt;br&gt;&nbsp; &nbsp; raise LumApiError(error)&lt;br&gt;lumapi.LumApiError: &#8216;Exception [&lt;Global&gt;::appOpened]: Session not found'&lt;br&gt;&gt;&gt;&gt;&nbsp;&lt;\/p&gt;&lt;div&gt;Also, I have same issue when using lumapi in vs code.&lt;\/div&gt;&lt;div&gt;&nbsp;&lt;\/div&gt;&lt;div&gt;I would appreciate your help.&lt;\/div&gt;&lt;div&gt;&nbsp;&lt;\/div&gt;&lt;div&gt;Best regards,&lt;\/div&gt;&lt;div&gt;Junhyung Park&lt;\/div&gt;<\/p>\n","protected":false},"template":"","class_list":["post-307556","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=\"Hello,I am facing the similar situation of ocassionally being unable to open FDTD file using python api in the ubuntu linux server. 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