Hi, Below \stretched works by itself, but causes a fatal error when in the macro (\Name). I get the same result with all variants. Perhaps there's a better way? MWE: %%%%%%%% \def\Name{\stretched[width=]} %\def\Name#1{\stretched[width=]{#1}} %\define[1]\Name{\stretched[width=]{#1}} \starttext \stretched[width=]{Hi there!} St. \Name{Banach} \stoptext %%%%%%%% Here's part of the log: ConTeXt ver: 2013.04.05 22:00 MKIV beta fmt: 2013.4.6 int: english/english … ! This can't happen (add_disc_widths). system > tex > error on line 10 in file foo18453.tex: This can't happen ( ... 1 \def\Name{\stretched[width=]} 2 \def\Name#1{\stretched[width=]{#1}} 3 %\define[1]\Name{\stretched[width=]{#1}} 4 5 \starttext 6 7 \stretched[width=]{Hi there!} 8 9 St. \Name{Banach} 10 >> 11 \stoptext 12 13 l.10 ! ==> Fatal error occurred, no output PDF file produced! mtx-context | fatal error: return code: 1 ________________________________ This e-mail message (including any attachments) is for the sole use of the intended recipient(s) and may contain confidential and privileged information. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this message (including any attachments) is strictly prohibited. If you have received this message in error, please contact the sender by reply e-mail message and destroy all copies of the original message (including attachments).