I am using RAD 8.0 and Websphere portal 6.1.0.3. I have developed my own JSF components. I added all the things as per this tutorial: JSF Tag Tutorial
And it worked. However suddenly I started getting a long stacktrace with
HTTP Error 500: Unable to locate tag library for uri /WEB-INF/tld/errors.tld,
when I open the page (errors.tld being my lib). Compile-time it doesn't complain about anything, in fact if I control+left click taglib directive in JSF file, it opens up the correct TLD file. Sometimes after clearing various temporary folders and recompiling the project I can get it to work again, but it will break again a few compiles and publishes to the server later (even though the only thing changed was some utility java class for instance). It has no rhyme or reason. Does anyone have this same problem and solution or workaround?