Hi, I recently ran into this "problem" that causes my module to not auto-load, and in fact prevents the Tomcat server from starting my T5 war file.
The error starts with Exception loading module(s) from manifest jar:file:/path-to-jar-file-in-web-inf-lib/MANIFEST.MF: Failure loading Tapestry IoC module class: stack trace starts at IOCUtilities.java:123 The culprit was that the MANIFEST.MF can't have lines longer than 72 characters, and if it is longer it [Maven] will wrap on the next line including an additional space. The total of my manifest is right at 72, but it wrapped it at 70 characters anyway. This is strange since I didn't have problems with it last week. The relevant lines of my manifest.mf for the pluggable module looks like this: Tapestry-Module-Classes: graphene.augment.mitie.web.services.MITIEModu le I'm using Maven 3.0.4, Tapestry 5.3.7, Jdk 1.7.0 I'm not sure if Tapestry could be made to take that into account and coalesce the Strings. I did discover it's part of the Java spec though: http://docs.oracle.com/javase/7/docs/technotes/guides/jar/jar.html#Notes_on_Manifest_and_Signature_Files