This compiler warning tells you there are two OPENREPORT functions and one returns a STRING and the other one a BOOLEAN. As long as you do not call functions that cause these warnings in an expression there is no problem.

The integration wizard does not tell the DataFlex Studio that the source code is UTF-8; in other words; it does not write a BOM character. Output is UTF-8 as the 20.0 wizards write UTF-8 strings.