In the current nuweb versions, the number of labels that can be generated is too limited when scrap arguments are used. For instance, for page 1 of a docment older versions of nuweb could generate labels 1a .. 1z, 1a1 .. 1z1. The current versions seems to generate labels 1a to 1z only. When a page contains more that 27 scrap definitions, this results in invalid LaTeX code. For instance, the following nuweb code is processed correctly in nuweb 1.01 (generating labels 1a up to 1g1), but incorrectly in nuweb 1.57. The resulting tex file generates LaTeX errors. The corresponding pdf file that is attached to this message.