B4J Question error for compile in debug mod

B4J Version: 6.01
Parsing code. (0.00s)
Compiling code. (0.03s)
Compiling layouts code. (0.00s)
Organizing libraries. (0.00s)
Compiling generated Java code. Error
javac 1.8.0_162
src\b4j\example\main.java:62: error: cannot find symbol
if (Debug.shouldDelegate(ba, "application_error"))
^
symbol: method shouldDelegate(BA,String)
location: class Debug
1 error

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