The following error was returned when trying to retrieve data from Jasper Studio 6.2.1 and 6.4, via Jasper JDBC URL:
"Query execution error
The following problem occurred:
Do you want to proceed anyway?
This has happened since around May 2018, and was working normally before.
This is even though the Database JDBC Connection "Test" was returned as "Successful."
And the Data Source was able to find tables, such as "INV_INVESTMENTS" and its fields.