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While trying to write \ar@{.>}[r] in my Lyx 2.0.4, the software gives me a

"Latex error": "Xy-pic error: Illegal ation (macro:-> \x@protect {\protect {). "

What should I do in order to fix it?

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While code snippets are useful in explanations, it is always best to compose a fully compilable MWE that illustrates the problem including the \documentclass and the appropriate packages so that those trying to help don't have to recreate it. – Peter Grill Dec 1 '12 at 9:29
@PeterGrill : How can I do it? – joshua Dec 1 '12 at 10:00
2  
Compose a minimal example that recreates this problem. It should start with \documentclass include the appropriate packages, then \begin{document}, your code, and end with \end{document}. And with the line in question commented out it should compile. Please have a look at this link regarding regarding a MWE. – Peter Grill Dec 1 '12 at 10:10
Follow up to @PeterGrill's comment: while LyX removes you from the sourcecode, you can find it: Select View --> View source, and check the box for Complete source on the right side of the source panel. Create a empty document with just the xypic that gives the error, and then copy this complete source. – Torbjørn T. Dec 2 '12 at 7:37

closed as too localized by Torbjørn T., Joseph Wright♦ Jan 5 at 21:04

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