Observation
Possible cause
Recommended action
Cannot download run result
files
The run failed. Links to run files
are not available for runs that
fail QC.
Repeat the run.
Genexus
™
Integrated Sequencer
Observation
Possible cause
Recommended action
The number of sample reads is
low, but CF-1 metrics pass QC.
If CF-1 reads per lane,
accuracy, and mean AQ20 read
length are good, a problem with
library preparation may be
indicated. Nucleic acid input
and/or quality may have been
insufficient.
For a sample run, re-quantify nucleic acid
samples and/or perform sample QC to ensure
that the expected nucleic acid input was
loaded.
If needed, re-isolate and purify nucleic acid
samples.
For a library run, re-quantify the sample
libraries and/or perform library QC to ensure
that the expected amount each library was
loaded.
One of more of the Genexus
™
Strip 1 strips used in the run
had magnetic beads trapped in
the tube 5 keyhole.
Repeat the run with strips that you have
verified have no trapped beads. For more
information, see “Before you begin“ on
Library strips were
inadequately equilibrated to
room temperature (Genexus
™
Strip 1), or incompletely thawed
(Genexus
™
Strip 2
‑
AS or
Genexus
™
Strip 2
‑
HD) before
loading in the sequencer.
Ensure that Genexus
™
Strip 1 strips are fully
equilibrated to room temperature, and
Genexus
™
Strip 2
‑
AS or Genexus
™
Strip 2
‑
HD
strips are completely thawed before loading in
the sequencer.
The number of sample reads is
low, and CF-1 metrics fail QC.
If CF-1 metrics failed QC, a
problem in templating or
sequencing is indicated. One or
more of the Genexus
™
Strip 3
‑
GX5
™
strips used in the
run may have had an excessive
amount of magnetic beads
trapped in the tube 6 or 7
keyhole.
Repeat the run with strips that you have
verified have no trapped beads. For more
information, see “Before you begin“ on
Template strips were
inadequately equilibrated to
room temperature (Genexus
™
Strip 3
‑
GX5
™
), or incompletely
thawed (Genexus
™
Strip 4)
before loading in the sequencer.
Ensure that Genexus
™
Strip 3
‑
GX5
™
strips are
fully equilibrated to room temperature, and
Genexus
™
Strip 4 strips are completely thawed
before loading in the sequencer.
The sequencing chip or coupler
was faulty or leaky.
Repeat the run with new chip and coupler. If
low performance continues, contact Technical
Support.
Appendix A
Troubleshooting
Genexus
™
Integrated Sequencer
A
Genexus
™
Integrated Sequencer User Guide
119