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HelloI am working my way through the CCD reduction guide and have run into problems making my combination of the flats. When I feed the inlist into EPAR FLATCOMBINE it gives me a result of :ERROR: No images to combine
"pclip=pclip, grow=0)"
line 48: ccdred$flatcombine.cl
called as: 'flatcombine (mode=h)'I'v tried to change the CCD-type to direct but then it gives me an error stating that the end of the header cannot be read.Any help will be appreciated.Thanks
RJC

Hello,I'm sorry that you did not get a reply earlier. The problem of not recognizing that some data are flats is a common one. The usual solution is to set the ccdtype to the null string ("") and then it is up to you to make sure you supply only flats. A value of "direct", if that is what you set ccdtype to, is not going to work. If you are still having troubles reply to this post with a listing of the parameters for FLATCOMBINE and we'll go from there.Yours,
Frank Valdes

Hi all,I'm having the same problem as the original post.
ERROR: No images to combine
"pclip=pclip, grow=0)"
line 48: ccdred$flatcombine.cl
called as: `flatcombine (input=k080701.011,k080701.012,k080701.013,k080701.014,k080701.015,k080701.016,k080701.017,k080701.019)'imtype is uncommented and set to "fit" in my login.clMy flatcombine pars are below. I've also set the image type in the parameters to null.
Image Reduction and Analysis Facility
PACKAGE = ccdred
TASK = flatcombineinput = List of flat field images to combine
(output = flat) Output flat field root name
(combine= average) Type of combine operation
(reject = avsigclip) Type of rejection
(ccdtype= ) CCD image type to combine
(process= no) Process images before combining?
(subsets= no) Combine images by subset parameter?
(delete = no) Delete input images after combining?
(clobber= no) Clobber existing output image?
(scale = mode) Image scaling
(statsec= ) Image section for computing statistics
(nlow = 1) minmax: Number of low pixels to reject
(nhigh = 1) minmax: Number of high pixels to reject
As another note I've noticed that there is also a flatcombine command under mscred. If I tried to run flatcombine while under mscred I don't get the same error but instead it tells me there is no data. I've checked file names, I've viewed the headers, and viewed the images in ds9. Everything seems fine.Any help is appreciated!

HiIt is possible that you are passing the image names incorrectly to FLATCOMBINE - i.e. It reads the passed file-names as the physical object and then cannot open them - therefore no file to open.Double check your method for passing the flat-files.From your param file it seem clear that the problem isn't the ccdtype setting.Hope this helpsPat

Thanks for your reply. In this case I'm just typing the file names directly into flatcombine at the prompt. >flatcombine file1,file2,file3,etcI've checked to make sure I'm not typing them incorrectly but everything is correct.Thanks again.