### Dec08

Following a bug reported by a CLASS user, it appeared that the outputs from AVERAGE and ACCUMULATE in some exotic modes were incorrect. As of the nov08 release of GILDAS, only the following configurations were fully correct. These include the default mode:

- ALIGN CHANNEL INTERSECT, WEIGHT TIME, BAD OR (default)
- ALIGN CHANNEL INTERSECT, WEIGHT SIGMA|TIME, any BAD
- ALIGN CHAN|VELO|FREQ INTERSECT, WEIGHT SIGMA|TIME, BAD OR

Other configurations (in particular the composite mode) may have produced correct output, but with no waranty since it was depending on the input spectra and the level of complexity of the combination. This bug was affecting the default CLASS (i.e. CLASS90), but CLASS77 had a comparable level of bug for these commands.

This bug was fixed in the dec08 release of CLASS90, by fully cleaning and factorizing the code. CLASS77 is not fixed according to the policy concerning it: this package is obsolescent and is frozen in order to keep a comparison point with CLASS90.