The original pool results were nonreactive for all of the samples.This issue was escalated to (b)(4) (nat tracker cmo).Both grifols and (b)(4) investigated the anomaly.The investigation included database simulations, review of the audit trail, error log, run report, and nat tracker software code.A network connectivity error occurred shortly before the incident.The assignment of reactive to the 17 samples occurred over a two second time period.The anomaly occurred prior to the transfer of the results to the customer lis.The assignment of reactive to a sample would only occur if an individual donor test (idt) or a manual change in the software had been performed.Review of the data from the procleix tigris instrument showed no idt samples and no reactive pools in the run.Review of the software audit trail showed no evidence of a manual data change.Neither grifols software engineering nor (b)(4) were able to duplicate the event on the nat tracker software.At the customer site, the grifols field service engineer and the customer were also unable to reproduce the results.The investigation could not determine a common link or scenario that would result in this anomaly.The assignment of the 17 samples as reactive was a remote occurrence that was not reproducible and has not previously been observed.
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