This is not a big issue, since there is a work around, but I noticed it nevertheless.
When one of the generator config files has an xml comment in it, it causes a [Core Exception] and prevents the "Generate" utility to function.
For example, the following caused a [Core exception]:
<task ...
... other parameters ...
<!--
<parameter name="templateAssemblySourceFileFormat" value="srcBaseEntityAscx.[extension]"/>
-->
</task>
Fix --> Remove the comments or remove the element altogether.