When generating images they are sometimes not as one would like them to be and one would like to see if this is an artifact / feature from the dot program or resulting from plantuml generation. For this purpose it would be useful to have the intermediate dot file available.
When looking at the question http://forum.plantuml.net/2034/add-dot-as-output-format?show=2034#q2034 the suggestion is made to use -keepfiles (superseded by -debugsvek) but here only some outlines are shown.
Suggestion is to add a new output format -tdot or to see to it that -debugsvek gives the complete dot file.