Hi Hans, can you add braces around the argument for the list key otherwise \savebuffer[a,b,…][…] won’t work. buff-ini.mkiv: \def\buff_save[#1][#2]% {\begingroup \doifassignmentelse{#1} {\setupcurrentsavebuffer[#1]}% - {\setupcurrentsavebuffer[\c!list=#1,\c!file=#2]}% + {\setupcurrentsavebuffer[\c!list={#1},\c!file=#2]}% \ctxcommand{savebuffer("\directsavebufferparameter\c!list","\directsavebufferparameter\c!file","\directsavebufferparameter\c!prefix")}% \endgroup} Wolfgang