3.
Check the Instance Bootstrap Developer Trace File
If the instance bootstrap was started, you need to analyze the following trace file:
<DIR_INSTANCE>/work/dev_bootstrap
The following problems may have been logged:
● The Java files for the bootstrap are missing:

*** ERROR => Can't load main class [com.sap.engine.offline.OfflineToolStart
Verify that the <DIR_INSTANCE>/j2ee/cluster/bootstrap directory exists and that it is not empty.
● The Java VM starts, but aborts immediately:

JLaunchIAbortJava: abort hook is called
Check the bootstrap log files. See 4. Check the Instance Bootstrap Log File from the Java VM.
● The Java VM starts and terminates with a non-zero return code:

JLaunchIExitJava: exit hook is called (rc=66)
Check the bootstrap log files. See 5. Check the Output from the Instance Bootstrap Java Class.
If you cannot find any problems in the bootstrap developer trace file, create a customer message for the BC-JAS-COR component, create an archive containing the installation log files and all files from the <DIR_INSTANCE>/work directory, and send the archive as an attachment to the customer message.