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Hi,the task doslit (in noao.imred.specred) in iraf 2.15a does not work anymore. It's supposed to give me an interactive window to select the aperture to extract the spectrum for.doslit only updates the file with adding a "CCDPROC" keyword (that's normal), and then writes in the logfile "Define object apertures".
Then it's done, and no spectrum is extracted.below are the parameters for doslit I use:
objects = "ISAAC.2006-05-02T09:31:34.411.fits" List of object spectra
(arcs = "") List of arc spectra
(arctable = "") Arc assignment table (optional)
(standards = "") List of standard star spectra\n
(readnoise = "1") Read out noise sigma (photons)
(gain = "1") Photon gain (photons/data number)
(datamax = INDEF) Max data value / cosmic ray threshold
(width = 5.) Width of profiles (pixels)
(crval = "INDEF") Approximate wavelength
(cdelt = "INDEF") Approximate dispersion\n
(dispcor = no) Dispersion correct spectra?
(extcor = no) Extinction correct spectra?
(fluxcal = no) Flux calibrate spectra?
(resize = yes) Automatically resize apertures?
(clean = no) Detect and replace bad pixels?
(splot = yes) Plot the final spectrum?
(redo = yes) Redo operations if previously done?
(update = yes) Update spectra if cal data changes?
(quicklook = yes) Minimally interactive quick-look?
(batch = no) Extract objects in batch?
(listonly = no) List steps but don't process?\n
(sparams = "") Algorithm parameters
(mode = "ql")
Any idea, what could be wrong?
Thank you in advance, uli

The task hasn't changed recently and problems like this are typically resolved by unlearning the task to reset the parameters (or e.g. doing a MKIRAF to reinitialize your uparm directory and effectively unlearn all params). If you still have problems, post back.