{"id":368350,"date":"2024-05-23T16:17:26","date_gmt":"2024-05-23T16:17:26","guid":{"rendered":"\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/"},"modified":"2024-05-23T16:17:26","modified_gmt":"2024-05-23T16:17:26","slug":"help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/","title":{"rendered":"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;."},"content":{"rendered":"<p>Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &#8220;vpd_3dB_bandwidth.isf&#8221; file from the &#8220;Vertical photodetector&#8221; example.&nbsp;<\/p>\n<p>There is an error comes: &#8220;<strong>Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable name<\/strong>&#8220;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png\"><\/p>\n<p><span style=\"text-decoration: underline\"><em><strong>Can you please help me to solve that problem<\/strong><\/em><\/span><em><strong>?<\/strong><\/em><\/p>\n","protected":false},"template":"","class_list":["post-368350","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &quot;vpd_3dB_bandwidth.isf&quot; file from the &quot;Vertical photodetector&quot; example. There is an error comes: &quot;Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/\" \/>\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=\"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &quot;vpd_3dB_bandwidth.isf&quot; file from the &quot;Vertical photodetector&quot; example. There is an error comes: &quot;Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-05-23T16:17:26+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-05-23T16:17:26+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &quot;vpd_3dB_bandwidth.isf&quot; file from the &quot;Vertical photodetector&quot; example. There is an error comes: &quot;Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png\" \/>\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\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/#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\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/#listItem\",\"name\":\"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;.\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/#listItem\",\"position\":3,\"name\":\"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;.\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@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\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/\",\"name\":\"Help me to solve this error \\u201cNS_nuderiv is not a valid function\\u201d. | Ansys Learning Forum\",\"description\":\"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the \\\"vpd_3dB_bandwidth.isf\\\" file from the \\\"Vertical photodetector\\\" example. There is an error comes: \\\"Error: D:\\\/Ansys\\\/NFET\\\/nanosheet script\\\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\\\/#breadcrumblist\"},\"datePublished\":\"2024-05-23T16:17:26+00:00\",\"dateModified\":\"2024-05-23T16:17:26+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum","description":"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the \"vpd_3dB_bandwidth.isf\" file from the \"Vertical photodetector\" example. There is an error comes: \"Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/#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\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/#listItem","name":"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;."},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/#listItem","position":3,"name":"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;.","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}}]},{"@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\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/","name":"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum","description":"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the \"vpd_3dB_bandwidth.isf\" file from the \"Vertical photodetector\" example. There is an error comes: \"Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/#breadcrumblist"},"datePublished":"2024-05-23T16:17:26+00:00","dateModified":"2024-05-23T16:17:26+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum","og:description":"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &quot;vpd_3dB_bandwidth.isf&quot; file from the &quot;Vertical photodetector&quot; example. There is an error comes: &quot;Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png","article:published_time":"2024-05-23T16:17:26+00:00","article:modified_time":"2024-05-23T16:17:26+00:00","twitter:card":"summary_large_image","twitter:title":"Help me to solve this error \u201cNS_nuderiv is not a valid function\u201d. | Ansys Learning Forum","twitter:description":"Hi, I want to find out the frequency response of the photodetector through impulse response from the step response and then perform a Fast Fourier transform (FFT). Here, I use the &quot;vpd_3dB_bandwidth.isf&quot; file from the &quot;Vertical photodetector&quot; example. There is an error comes: &quot;Error: D:\/Ansys\/NFET\/nanosheet script\/vpd_3dB_bandwidth.lsf line 16: NS_nuderiv is not a valid function or variable","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2024\/05\/23-05-2024-1716480811-mceclip2.png"},"aioseo_meta_data":{"post_id":"368350","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:40:54","updated":"2024-10-28 16:40:54","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tHelp me to solve this error \u201cNS_nuderiv is not a valid function\u201d.\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"Help me to solve this error &#8220;NS_nuderiv is not a valid function&#8221;.","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-me-to-solve-this-error-ns_nuderiv-is-not-a-valid-function\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["348579","33648"],"_bbp_author_ip":["184.24.96.177"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["379"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["368350"],"_bbp_forum_id":["27833"],"_bbp_engagement":["33648","348579"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["368363"],"_bbp_last_active_id":["368363"],"_bbp_last_active_time":["2024-05-23 17:41:35"]},"test":"d11943014ntu-edu-tw"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/368350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/368350\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=368350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}