Hi Reagan,
Thank you for replay.
The content of the file /usr/sap/SID/SUM/sdt/log/SUM/DETECT-SECSTORE-DIRECTORY_01.LOG is
<!--LOGHEADER[START]/-->
<!--HELP[Manual modification of the header may cause parsing problem!]/-->
<!--LOGGINGVERSION[2.0.7.1006]/-->
<!--NAME[/usr/sap/SPP/SUM/sdt/log/SUM/DETECT-SECSTORE-DIRECTORY_01.LOG]/-->
<!--PATTERN[DETECT-SECSTORE-DIRECTORY_01.LOG]/-->
<!--FORMATTER[com.sap.tc.logging.TraceFormatter(%d [%6s]: %m)]/-->
<!--ENCODING[UTF8]/-->
<!--LOGHEADER[END]/-->
Aug 19, 2014 5:32:27 PM [Error ]: The following problem has occurred during step execution: com.sap.sdt.util.diag.DevelopmentSupportRequiredException: Assertion failed for (instanceToUse = null) at com.sap.sdt.j2ee.services.servicesimpl.DetermineSecStoreDirectoryService.determineSecStoreDir(DetermineSecStoreDirectoryService.java:95).
.
Best regards
Ernesto