Nextseq 500 no values for read.error_rate().mean() and read.percent_aligned().mean()

[yelekley]

Hello, I'm not getting any values per read with read.error_rate().mean() and read.percent_aligned().mean() for Nextseq 500 but works fine with Novaseq output that we also use. Do you have any suggestions how to extract these metrics? Thanks

[ezralanglois]

Is this for every NextSeq 500 run? Or just one run?

If there is no PhiX spiked or if the spike is very small, then those values should be NaN