> 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/miniseq/instrumentation-miniseq-troubleshooting-list/000006299.md).

# Troubleshooting MiniSeq Z stages are not ready initialization error

If a loaded flow cell is not seated correctly during a power cycle, the MiniSeq Control Software (MnCS) will fail initialization with the following error:

* "The following Z stages are not ready after initializing: 1"
* "1 devices failed initialization and 2 devices were never initialized: ImagingModule: Initialize FAILED, Fluidics: NOT Initialized, Instrument: NOT Initialized (Illumina.Instrument.Logic.ApplicationBase.DeviceException)"

  ![](/files/C7VMQBwwzZnHMD67jly9)

If this error occurs, contact Illumina Technical Support at <techsupport@illumina.com> for assistance.

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| *For any feedback or questions regarding this article (Illumina Knowledge Article #6299), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000006299%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


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