![](https://secure.gravatar.com/avatar/cdac1bce4ec96619cde73d2f2be4e66d.jpg?s=120&d=mm&r=g)
Frank Küster
There is a configuration variable nest_size level, but it doesn't seem to help in this case: The attached file gives an error
! TeX capacity exceeded, sorry [grouping levels=255].
although my texmf.cnf has nest_size=500.
I find it awfully hard to reliably trigger a semantic nest size overflow. The best I have been able to come up with was dak@lola:~$ tex This is TeX, Version 3.141592 (Web2C 7.5.6) **\def\x{\vbox\bgroup x\x}\x ! TeX capacity exceeded, sorry [semantic nest size=500]. <recently read> \bgroup \x ->\vbox \bgroup x\x <*> \def\x{\vbox\bgroup x\x}\x No pages of output. Transcript written on texput.log. But this only barely triggers, since 500 is less than 2*255, the grouping level limit. And I can't at the moment think of a way to get more than two semantic nests per grouping level. Can anybody think of a semantic nest without grouping apart from unrestricted hmode (which I use above)? -- David Kastrup, Kriemhildstr. 15, 44793 Bochum