This morning I can't process some images of V0849 Her because VPhot can't find the AAVSO sequence for this star. It finds the variable via VSX just fine but reports there are no sequence stars available for this star (checking with other stars works fine). Yet, it will show the chart (with comp stars marked) and the sequence chart for this star (downloads from the AAVSO VSP).
Links:
[1] http://www.aavso.org/forums/variable-star-observing/vphot
[2] http://www.aavso.org/category/tags/photometry
[3] http://www.aavso.org/category/tags/vphot