# Analysis Launch with NovaSeq 6000Dx Application

When using the NovaSeq 6000Dx application, DRAGEN TSO 500 analysis starts automatically after sequencing completes.

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The v2.6.2 app uses DRAGEN v3.11.2, which is not designed to be co-installed with earlier DRAGEN versions (e.g. v3.10.18 and below, v4.3.5 and below). When launching analysis after installing another NovaSeq 6000Dx app and its dependent version of DRAGEN (that does not support multi-version installation), the software may sporadically be unable to run.\
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For example, users may encounter an issue if the following steps occur in order:

1. installation of the DRAGEN TSO 500 v2.6.2 app for NovaSeq 6000Dx and its dependent DRAGEN, v3.11.2
2. installation of the DRAGEN TSO 500 v2.6.0 app\* for NovaSeq 6000Dx and its dependent DRAGEN, v3.10.17
3. analysis is initiated using DRAGEN TSO 500 v2.6.2 app

<sup>\*</sup>or any other app requiring an incompatible DRAGEN version. See [installation-of-2.6.2-on-standalone-dragen-server](https://help.connected.illumina.com/tso500/dragen-tso-500-guides/dragen-tso-500-v2.6/getting-started/installation-of-2.6.2-on-standalone-dragen-server "mention") for DRAGEN co-installation compatibility.

See Troubleshooting section for a workaround. [novaseq-6000dx-app-troubleshooting](https://help.connected.illumina.com/tso500/dragen-tso-500-guides/dragen-tso-500-v2.6/troubleshooting/novaseq-6000dx-app-troubleshooting "mention")
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