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Thanks cgneider. Your suggestion does what I need, and is simpler than I had envisaged. To answer your question, what I intended (and said) was to generate the file names, not the files themselves, which is what you provided.

Thanks again

I'm preparing a large document with approximately 300 included source files. Depending on certain flag settings, I also add other files such as images. I would like to do this as a command definition so I don't duplicate the inclusion logic (which can change) in the master document 300 times, The ...

I'm an inexperienced LaTeX user creating a document with the book class. I've included a \printindex command in the \backmatter and the index appears in the customary two-column format.

The problem arises with topics having multiple entries, resulting in the line being too long for the column ...