Question Bart De Boeck · Jul 28, 2021 [SQLCODE: <-400>:<Fatal error occurred>] Dear, From time to time I get the following error after executing a select statement: [SQLCODE: <-400>:<Fatal error occurred>][Cache Error: <<UNDEFINED>Main+65^%SYS.DBSRV *%qsc(1187,8)>][Location: <ServerLoop>] InterSystems.Data.CacheClient.CacheException [SQLCODE: <-400>:<Fatal error occurred>][Cache Error: <<UNDEFINED>Main+65^%SYS.DBSRV *%qsc(1187,8)>] After repeating the query, the query succeeds. How do I start debugging this type of issue? #Caché 0 3 0 536