Several bugs exist in JObserve version 1.6.5, some of which are mentioned in this document and can be worked around to some extent. We do, however, highly recommend using a more recent release of JObserve if possible.
Two of the known bugs that may commonly affect users are:
JObserve version 1.6.5 does not interpret TIP scans correctly. If Tipping procedure is specified as the Observing Mode on the Source Page, then the positions entered in the Right Ascention and Declination fields are interpreted by the VLA online system as azimuth (in "hh mm ss.sss" format) and elevation, respectively. However, JObserve takes these to be R.A. and Dec., calculating slew times erroneously, listing incorrect azimuths and elevations on the Scheduling Page, and possibly reporting other errors. There are several ways to work around this problem, and perhaps the most straightfoward is to experiment with a Right Ascention and Declination on the Source Page to give the desired starting azimuth and elevation on the Scheduling Page so that the calculated slew times are correct, and then to edit this scan in the final observe file replacing the R.A. and Dec. with the desired starting azimuth and elevation in the correct format.
Another known problem is that when making changes or updates to a scan in the User Default List, the changes do not propagate to the scans in other lists that use this User Default. The best way to work around this problem is to create a new, updated, User Default and insert this into the relevant scans, or to try Global or Block edits.