UV-Vis Spectrophotometry problem.?

The instrument is self-calibrating. After the self-calibration the wavelength and absorbance accuracy were all pass. But the Stray light is failed. My question is, is it okay that your stray light is failed? What is the probable reason of failed Stray light? Is there any other method to calibrate it other than self-calibration?

Answer:
the calibration is probably shot, just call the maufacturer and have a beer
There is another method to do external calibration with a suite of standards. Just guess, but stray light could be from an allignment problem. You should contact your instrument manufacturer.

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