You are running an upgrade using the SUM tool but during the execution, below error is prompted at the PREP_INIT/SETSYNC_PREP_STARTED stage.
Solution
As referred to SAP Note 2297309 – No synchronization mechanism available, this is usually caused by the wrong URL to startup the common GUI.
You are upgrading a dual stack system, you should start the common GUI by using the URL below:
https://[hostname]:1129/lmsl/sumjava/[SID]/dual.html
or
http://[hostname]:1128/lmsl/sumjava/[SID]/dual.html
But you use the URL of ABAP system like this:
https://[hostname]:1129/lmsl/sumabap/[SID]/doc/sluigui
or
http://[hostname]:1128/lmsl/sumabap/[SID]/doc/sluigui
Note
- The ABAP stack only system should refer to the ABAP stack only guide.
- The Java stack only system should refer to the Java stack only guide.
- The dual stack system should refer to the dual stack guide.
Reference
- 2297309 – No synchronization mechanism available
- 2312141 – SUM – SETSYNC_PREP_STARTED : No synchronization mechanism available
- 2465552 – Dual stack upgrade: SUM fails during PREP_INIT/SETSYNC_PREP_STARTED phase with error : “No synchronization mechanism available”
