## Known Bugs

This section contains the list of bugs known as of October 8, 2025.

- Discovered 15-Nov-2022 UV_RESTORE in Mosaic mode leads to subsequent crashes if the channel range is restricted by UV_MAP because a single beam cannot be applied to all channels.
  This is often the case for ALMA data, because of the shift implied by the Doppler correction when creating the UVFITS files. A work around is to manually drop the edge channels by reading a coherent range of channels, and over-writing the UV data.

- Corrected 08-Sep-2022 Bug correction in EXTRACT command.
- Corrected 29-Jun-2022 STOKES command had incorrect derivation from H-V polarization
- Corrected 09-Jun-2022 Debug UV_FLAG command - Allow to use without Display.
- Corrected 13-Apr-2022 MAP_COMBINE and COMBINE were not supporting big files.
- Corrected 12-Apr-2022 UV_RESIDUAL was not working on a non-sorted Mosaic data set. This could only happen by reading the Clean Component Table after reading the UV data, without any imaging step.
- Corrected 09-Mar-2022 CCT_MERGE Concatenation was improper
- Corrected 07-Mar-2022 Beam size derivation was incorrect when an ANGLE was specified
- Corrected 08-Feb-2022 UV_RESTORE was not using fixed beam size.
- Corrected 18-Jan-2022 SINGLEDISH data was incorrectly read, probably since 20-Sep-2021 (v1.53 of read.f90). Improper values were thus used by the UV_SHORT command ( Discovered 17-Jan-2022 only).
- Corrected 12-Jan-2022 Mosaic offsets were improperly computed by command UV_FIELDS since 29-Jul-2021 (bug reported 10-Jan-2022). The script @ fits_to_uvt was thus leading to wrong pointing offsets.
- Corrected 10-Jan-2022 A improper interaction between scripts was causing strange behaviour when switching between EXPLORE and INSPECT_3D commands.
- Corrected 06-Jan-2022 The SIC command DEFINE IMAGE failed on large FITS files. This prevented SHOW and VIEW to work directly from these files.
- Corrected 18-Dec-2021 UV_TIME produced incorrect results on tables with different weights per channel (e.g. those produced by UV_MERGE /MODE CONCATENATE).
- Corrected 13-Dec-2021 Remove occasional infinite loop in MAP_CONTINUUM with method GAUSS (discovered 01-Dec-2021)
- Corrected 18-Nov-2021 UV_REWEIGHT syntax bug