https://community.dynatrace.com/t5/Dynatrace-Managed-Q-A/You-cannot-use-quot-unregister-quot-option-during-upgrade/m-p/117870#M592 <P>Hello Daniel,</P><P>I don't think you can use that option by itself. Try: /bin/sh dynatrace-managed.sh --uninstall --unregister</P><P>Thanks,</P><P>David Nicholls</P><BR /> Tue, 07 May 2019 20:03:06 GMT david_n 2019-05-07T20:03:06Z https://community.dynatrace.com/t5/Dynatrace-Managed-Q-A/You-cannot-use-quot-unregister-quot-option-during-upgrade/m-p/117869#M591 <P>Trying to use the option</P><P><CODE>--unregister</CODE> — Use this parameter when uninstalling a cluster to unregister the cluster and release license from Mission Control.</P><P>but i received </P><P># ./dynatrace-managed.sh --unregister<BR />Starting Dynatrace 1.166.90.20190423-100415 installer ...<BR /><BR />Upgrade failed after less then 1 second.<BR />Exit code: 1<BR /><BR />Errors:<BR />You cannot use "--unregister" option during upgrade.<BR /><BR />More details in log file: "/var/log/dynatrace/install.log"</P><P>I've stopped the server, disabled automatic updates and getting the same. How can I cancel Upgrade?</P><BR /> Tue, 07 May 2019 18:06:09 GMT https://community.dynatrace.com/t5/Dynatrace-Managed-Q-A/You-cannot-use-quot-unregister-quot-option-during-upgrade/m-p/117869#M591 dstanizzo 2019-05-07T18:06:09Z https://community.dynatrace.com/t5/Dynatrace-Managed-Q-A/You-cannot-use-quot-unregister-quot-option-during-upgrade/m-p/117870#M592 <P>Hello Daniel,</P><P>I don't think you can use that option by itself. Try: /bin/sh dynatrace-managed.sh --uninstall --unregister</P><P>Thanks,</P><P>David Nicholls</P><BR /> Tue, 07 May 2019 20:03:06 GMT https://community.dynatrace.com/t5/Dynatrace-Managed-Q-A/You-cannot-use-quot-unregister-quot-option-during-upgrade/m-p/117870#M592 david_n 2019-05-07T20:03:06Z