# 500 error for company advanced search with sic\_codes param

**URL:** <http://forum.companieshouse.gov.uk/t/500-error-for-company-advanced-search-with-sic-codes-param/13031>\
**Category:** API Issues\
**Created:** [September 26, 2026, 7:32pm UTC](http://forum.companieshouse.gov.uk/t/500-error-for-company-advanced-search-with-sic-codes-param/13031 "2026-09-26T19:32:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![LeeS](http://forum.companieshouse.gov.uk/letter_avatar_proxy/v4/letter/l/57b2e6/32.png) [@LeeS](http://forum.companieshouse.gov.uk/u/LeeS)\
**Post date:** [September 26, 2026, 7:32pm UTC](http://forum.companieshouse.gov.uk/t/500-error-for-company-advanced-search-with-sic-codes-param/13031/1 "2026-09-26T19:32:47Z")

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I’m getting a 500 error when calling `/advanced-search/companies` with the `sic_codes` query param. If I remove the query param it works.