Joel C. Salomon wrote: > %\setlength{\intersentencespace}{\issp plus \isst minus \issh} <snip> > How can I set a rubber length the way I’m trying to? Answered on comp.text.tex: Coerce the <skip> values to <dimen> values, i.e.: \setlength{\intersentencespace}{1\issp plus 1\isst minus 1\issh} or use scratch <dimen> registers. —Joel Salomon