157: Math module missing
This error message has been obsolete since version 27 of the Aneamal Translator. A related error message is 186: Module not found.
Legacy information
Mathematical formulae are usually written with LaTeX commands and set between $…$
within a paragraph or between $$…$$
as an own block which can use more space. A math module is necessary to display them beautifully. The module is missing in your case.
Solution
Choose a math module. Installation is very easy.
If you did not mean to write a math formula, but want to use $
literally as currency sign, you can prepend a backslash: \$