Solution : https://service.sap.com/sap/support/notes/1462715 (SAP Service marketplace login required)
Key words :
terms rz20 ccms daylight saving reason, function salc_al_read_alertdata_by_aid alert creation time, local time zone configuration, daylight saving time, function salc_al_read_alertdata_by_aid fails, creation date older, start transaction rz20, marked red indicating, supplied alert identification, machine-readeable unix
Related Notes :
| 1348674 | No alerts visible in the RZ20 although nodes are red |