Hi Hans, as already reported (https://mailman.ntg.nl/pipermail/ntg-context/2022/105443.html), LMTX (from 2022.05.02 16:19) quits messaging only fatal error with such a sample: \starttext \startitemize \item one \stoptext I know that \stopitemize is missing above. But in real--world documents, this mistake may need hours to be fixed. Would it be possible that LMTX could provide more verbose information about unfinished \start-commands? Many thanks for your help, Pablo