Marius Ionescu wrote:
Hello,

I installed LyX 1.6 from svn yesterday (I am trying to update the Romanian
localization). Whenever I open one of the documents I wrote using LyX
1.5and try to vizualize them I receive the following error:
"LaTeX Error: Environment thm undefined"

I receive the same error if I start a new document, select the AMS class,
add the "Theorems (AMS)" module, write a theorem or proposition, and try to
view the document. I do not get this error message if I select the "Theorem"
module instead. I do need, however, to use the "Theorems (AMS)" module for
my work.

I'll look at this shortly. In the meantime, try adding "\usepackage{amsthm}" to the preamble.

rh

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