-Xbootclasspath/p is no longer supported as of JDK9 and JDK12 is the latest version.  Changed to /p to /a.
diff --git a/bin/aasdoc.bat b/bin/aasdoc.bat
index 0daad06..569363c 100755
--- a/bin/aasdoc.bat
+++ b/bin/aasdoc.bat
@@ -30,4 +30,4 @@
 

 if "%FLEX_HOME%"=="" set FLEX_HOME=%~dp0\..

 

-java -Xmx1024m -Dsun.io.useCanonCaches=false -Xbootclasspath/p:"%FLEX_HOME%\lib\xalan.jar" -classpath "%FLEX_HOME%\lib\asdoc.jar" flex2.tools.ASDoc +configname=air +flexlib="%FLEX_HOME%\frameworks" %*

+java -Xmx1024m -Dsun.io.useCanonCaches=false -Xbootclasspath/a:"%FLEX_HOME%\lib\xalan.jar" -classpath "%FLEX_HOME%\lib\asdoc.jar" flex2.tools.ASDoc +configname=air +flexlib="%FLEX_HOME%\frameworks" %*