According to SAP note 2287046 it is possible to create stack.xml WITHOUT SolMan present. For NW 7.50 AS JAVA it says the procedure is like: 2293050.
I have downloaded the latest version of SUM, unpacked it, changed the file startup.props as per step 3 and 4. After starting SUM on the instance host (as stated for unix /usr/sap/<SID>/SUM/STARTUP confighostagent <SID>) and opening the url: http://HOST:1128/lmsl/sumjava/SID/index.html it starts as described - not asking for any options. After the process is completed, I get the final step. At this point, and later no file is found in usr/sap/<SID>/SUM/sdt/htdoc/SysInfoExport.xml , also no file (404 error) here: http://<sum-hostname>:1128/lmsl/sumjava/<SID>/SysInfoExport.xml
In the steps of SUM it says it has gathered the system info, but no file is quoted there.
Do I miss something, or I have to open a ticket to SAP?