Occasionally I need to figure out what’s going on when a page on the SCA server is being generated, this is not straightforward. If you add these two URL paramaters, SCA will generate extra debugging statements at the end of the HTML stream that will give you extra insight as to what might be wrong with your code.

?seodebug=T&preview=1

Each time you make a fix, change the value of the preview parameter and SCA will generate fresh output instead of serving you something from the cache.