Hello, The Letter module seems to also include a module for memos. The following MWE fails with version 2021.10.10 23:43: \usemodule[memo] \setupmemo[ opening={People of Earth}, closing={Thanks for all the Fish,}, signature={The Dolphins}] \startmemo \startletter We are writing to let you know that we are all leaving \stopmemo \stoptext The following error is thrown by ConTeXt: tex error > tex error on line 197 in file /home/jason/.local/context/tex/texmf-modules/tex/context/third/letter/base/s-cor-02.mkvi: Undefined control sequence \???memosectionrenderings <argument> \???memosectionrenderings \v!head :\v!memo <macro> \syst_setups_start_tex_two #1#2#+\stopsetups ->\endgroup \dodoglobal \instance \defcsname \??setup #1:#2 \endcsname #1{#3} \stopsetups 187 \stopsetups 188 189 \startsetups[\???memosectionrenderings\v!head:\v!memo] 190 \def\\{\correspondencesectionparameter\c!separator} 191 \startpacked 192 \doifsomething{\correspondenceparameter\c!fromname}{\memotext\c!fromname \correspondenceparameter\c!fromname \par} 193 \doifsomething{\correspondenceparameter\c!date }{\memotext\c!date \correspondenceparameter\c!date \par} 194 \doifsomething{\correspondenceparameter\c!toname }{\memotext\c!toname \correspondenceparameter\c!toname \par} 195 \doifsomething{\correspondenceparameter\c!subject }{\memotext\c!subject \correspondenceparameter\c!subject \par} 196 \stoppacked 197 >> \stopsetups 198 199 \unexpanded\def\correspondence_memo_head_table#element% 200 {\doifsomething{\correspondenceparameter#element} 201 {\NC % label 202 \def\currentcorrespondencestyle{\v!memo:#element}% 203 \usecorrespondencestylestyleandcolor\c!titlestyle\c!titlecolor 204 \memotext#element 205 \EQ % text 206 \def\currentcorrespondencestyle{\v!memo:#element}% 207 \usecorrespondencestylestyleandcolor\c!textstyle\c!textcolor The control sequence at the end of the top line of your error message was never \def'ed. You can just continue as I'll forget about whatever was undefined. mtx-context | fatal error: return code: 256