Dear Hans, Dear all Once angain me trying to convert my lecture notes into epub. At first: finally switching after some installation hassle to really latests context disttibution -------------------------------------------------------------------- mtx-context | Cmtx-context | ConTeXt Process Management 1.06mtx-context | mtx-context | main context file: /usr/local/share/context/tex/texmf- context/tex/context/base/mkiv/context.mkiv mtx-context | current version: 2025.02.28 18:16 mtx-context | main context file: /usr/local/share/context/tex/texmf- context/tex/context/base/mkxl/context.mkxl mtx-context | current version: 2025.02.28 18:16 onTeXt Process Management 1.06 mtx-context | mtx-context | main context file: /usr/local/share/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv mtx-context | current version: 2025.02.28 18:16 mtx-context | main context file: /usr/local/share/context/tex/texmf-context/tex/context/base/mkxl/context.mkxl mtx-context | current version: 2025.02.28 18:16 -------------------------------------------------------------------- solved all my previous problems. But what i now notices is a strange behaviour regarding the math equations in the resulting html, xml and xhtml when there is at least one figure with an external graphic in the document (see attached hopefully minimal enough example). The xml/html/xhtml files contain a mathcontent tag/div which correctly contains the mathml for the equation. the tag/div it selve has the image attibute set which points to the first image file imported before. I do guess this is intended to be a fallback, in case browser or read can not properly handle and display mathml content. I do further guess that in my installation i do miss some external program or library or some environment variable is not set or not properly set. In parallel i have installed texlive - without outdated luatex context- as i do need latex for other stuff too. So my question is where and how to tweak installation to get a proper result. Best whishes Christoph