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\doifnotallmodes{mode1,mode2,mode3}{ defaultmode instructions } gets the following error message: system : mark BibTitle defined [subject] ! Missing number, treated as zero. <to be read again> \scct:0 \catcodetable ...\fi \the \csname @@cct:\number #1 \endcsname \popcatcodetable ...atcoderestorelevel \endcsname \tracepopcatcodetable \adv... \docheckforallmodes ...\cleanuplabel {#3}\protect \checkedmodetrue \rawproce... .344 ...des{frontbackmatter,memorialnote,article} whereas \startmode[defaultmode] instructions \stopmode and \enablemode[defaultmode] runs without incident. Am I misusing \doifnotallmodes? This used to work. Alan