2783938 - java.io.IOException: Cannot run /bin/ksh - execve failed (ENOENT - No such file or directory) when running sybrestore - SAP ASE

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Start Backup Server
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java.io.IOException: Cannot run /bin/ksh - execve failed (ENOENT - No such file or directory)
        at java.lang.UNIXProcess.forkAndExec(Native Method)
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:193)
        at java.lang.ProcessImpl.start(ProcessImpl.java:132)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1039)
        at com.sybase.ase.restore.master.UnixShell.runAndWait(UnixShell.java:157)
        at com.sybase.ase.restore.master.Master.startBackupServerinBackground(Master.java:2471)
        at com.sybase.ase.restore.master.Master.restartBackupServer(Master.java:2694)
        at com.sybase.ase.restore.master.Master.start(Master.java:165)
        at com.sybase.ase.restore.Service.restoreFromMasterDatabaseCorruption(Service.java:3202)
        at com.sybase.ase.restore.cli.Parse.loopParse(Parse.java:76)
        at com.sybase.ase.restore.Sybrestore.run(Sybrestore.java:270)
        at com.sybase.ase.restore.Sybrestore.main(Sybrestore.java:69)
Backup Server is not started. Cannot continue.

SAP Adaptive Server Enterprise

ksh, ENOENT, backupserver, backup, server, boot , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem