Created attachment 204453 [details] R.docx Attached DOCX contains R symbol for Set of real numbers. On the bottom is image how it looks in MSO. When opening in LO, simple R is shown, which is not correct. When saved and reopened, also in MSO simple R is shown. LO has that symbol in Formula-Elements-Set Operations. So this look like filepen bug for DOCX. OO did not read it. This seems implementation error somewhere in 3.x.
Within document.xml you can find this : <w:rPr><w:rFonts w:ascii="Cambria Math" w:hAnsi="Cambria Math" w:cs="Arial"/> <w:color w:val="000000" w:themeColor="text1"/><w:sz w:val="48"/><w:szCs w:val="48"/></w:rPr> <m:t xml:space="preserve"> R </m:t></m:r> So, this is really an L letter within a specific (non-free) font. Could you try it on a reversed way ? That is, compose first your document within LO, using the setR symbol in LO Math, save your document in docx format and open it in MS Word. What do you get ?
Created attachment 204454 [details] Variant
I did the aforementioned experiment. It seems that in the resulting docx file Lo uses the Unicode U+211D character.
Should be fixed with https://gerrit.libreoffice.org/c/core/+/196305.
Pranam Lashkari committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/d2dc364ca322f7331652a184a2a69d585b2615da tdf#169843 math: OOXML set letter not interpreted correctly It will be available in 26.8.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Pranam Lashkari committed a patch related to this issue. It has been pushed to "libreoffice-26-2": https://git.libreoffice.org/core/commit/e172a3343eae39b5d45bfb99fd88c51bfd9d7b01 tdf#169843 math: OOXML set letter not interpreted correctly It will be available in 26.2.0.2. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Xisco Fauli committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/8b9a76140691635ca3625f108e1a145dfdc3fb9a tdf#169843: sw_ooxmlimport2: Add test It will be available in 26.8.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
I assume this can be closed. Thank you Pranam.
Pranam Lashkari committed a patch related to this issue. It has been pushed to "libreoffice-25-8": https://git.libreoffice.org/core/commit/bc1606b1516b5915c4f11e0f3fce9d9fe71ccb10 tdf#169843 math: OOXML set letter not interpreted correctly It will be available in 25.8.5. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.