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Thanks StarValkyrie

Well this is what I get after I made those changes.

1. undefined control sequence

\trnumber
{0701}
The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., `\hobx'), type `I' and the correct
spelling (e.g., `I ...

Hi I have the following code written in lyx preamble. It does not compile anymore and the following error messages are produced.


1. \documentclass[titlepage]{
csetr-notr}
The document may only declare one class.

2. \trnumber
{0701}
The control sequence at the end of the top line
of your error ...