‘ERROR: HDMGETR: No value found’ of flatcombine

jjbykk9999 wrote on Feb 14, 2019

I started to study how to use iraf,

but when I use flatcombine, it says

ERROR: HDMGETR: No value found

"ccdproc (ims, output="", ccdtype=ccdtype, noproc=no"

line 38: ccdred$flatcombine.cl

called as: 'flatcombine (mode=h)

but, I don't know what this error means.

zerocombine and darkcombine worked well but flatcombine didn't.

I use flatcombine under this parameter setting

input = @Flat.list

output= FLat

combine=median

reject= avsigclip

ccdtype=

process= yes

subsets= yes

clobber= no

scale= mean

statsec=[51:460,51:460]

nlow= 1

nhigh= 1

mclip= yes

lsigma= 3.

hsigma= 3.

rdnoise= 15

gain= 2.2

snoise= 0.

pclip= -0.5

blank= 1.

mode= ql

and in the @Flat.list, there are u, v, b filter flat images so I used subset.

If there is anything you say needed to know, I will attach it.

Thaks

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Mike Fitzpatrick wrote on Feb 19, 2019

Generically, the error means that some header parameter was not found when CCDPROC was run (because you had the process=yes parameter set), commonly this is the exposure time ('exptime') keyword. If you do have an exposure time in the header, it may be that the SETINSTRUMENT task needs to be run to get the right header values, or the CCDPROC task has parameters set from a previous run that doing an "unlearn ccdproc" might clear up. If the problem continues, please post an image header from one of the flat files.

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Last post on Feb 19, 2019