Lei,
We could do with a little more information about the command you used...
My guess is that you are using on-the-fly format conversion turning an
NDF into a FITS file. The NDF has an `airlock' of FITS-like headers
usually a record of the original headers, but they can be modified to
reflect processing history. On export to a FITS file these airlock
headers are merged with NDF information, such as HISTORY, to form the
headers in the FITS file. Now it looks like one of these headers has a
TAB character that's not permitted by the FITS standard, thus you see
these warnings.
It is possible to see the original NDF please? Did you provide the
HISTORY headers or were these in the original data or generated by
CUPID?
Malcolm
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