> For the complete documentation index, see [llms.txt](https://knowledge.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.illumina.com/instrumentation/nextseq-500-550/instrumentation-nextseq-500-550-troubleshooting-list/000002449.md).
# Troubleshooting a Software Shutdown Issue Warning on the NextSeq 500/550 with NCS 4.0.X
The following message can appear when shutting down or restarting the NextSeq 500/550. This can be related to having Proactive enabled.
**Software shutdown issue(s):**\
**Data from the previous sequencing run is being sent to persistent storage. Select Cancel to wait for the transfer to finish.**\
**Do you want to proceed?**
**Troubleshooting steps:**
1. If the instrument **not connected to the internet**, disable Proactive monitoring as follows:
1. Navigate to the NextSeq Control Software.
2. Select **System Settings**.
3. Deselect the option **Send Instrument Performance Data to Illumina**.
2. If all runs have completed transfer and/or upload, apply instructions found in the following article: **Troubleshooting a NextSeq 500/550 NextSeq Control Software (NCS) v4.0+ UCS error**.
3. If the most recent run is still being transferred and/or uploaded, it is acceptable to select **Proceed** and ignore the message.
* If run data had not finished copying, Universal Copy Service (UCS) will continue process after instrument has been restarted.
* **Note**: This warning will have no impact on run quality or performance.
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| *For any feedback or questions regarding this article (Illumina Knowledge Article #2449), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000002449%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |
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