The cite completion in vim-latex does not work on my machine (Ubuntu 14.04) for a specific document.
The document is a doctoral dissertation and involves multiple subdocuments that are imported into the higher-level parts of the document via subimport.
The idea from  to create a minimal reproducible example and test completion thereon was successful, however, only for the simple example. How should I go forward get the cite autocompletion to work for the complex document?
Here is one other thing I have noticed: On the minimal example mentioned above, pressing F9 opened the quickfix window. In contrast, for the complex document, pressing F9 in a
has no consequences at all. Maybe this information is useful in tracking down the problem? Any help or hints are much appreciated!