User development, A new message was posted in the thread "cannot access added Field in some cases. Please help.": http://community.jboss.org/message/524066#524066 Author : Arvind K Profile : http://community.jboss.org/people/megalodon Message: -------------------------------------------------------------- Hello,   *Some background regarding my issue*: I have obtained the byteArray of the class using a ClassFileTransformer added to an Instrumentation object. I am then using the ClassPool.makeClassIfNew() function to create the corresponding CtClass object.   *Issue*: I am creating a simple int field using      myCtField = CtField.new(CtClass.intType, "myInt", myCtClassObj)   and then adding theCtField to the CtClass using myCtClassObj.addField(myCtField);   Now I am adding access to the field, within a method in the class represented by the CtMethod object myCtM, using a simple statement like, myCtM.insertBefore("myInt = 10;");                 I am then using CtClass.toBytecode() to get the instrumented bytecode which I am sending back to the ClassFileTransformer to be loaded. Now, When the class gets instantiated and 'executed', I would get a *CannotCompileException* as follows: javassist.CannotCompileException: [source error] no such field:  myInt   *HOWEVER*, when I perform the same instrumentations such as above in a simpler Javassist example and then use CtClass.toClass(), create a new class and a new instance of it using the newInstance() function and execute the modified method, I am able to access the newly added field just fine!   *What am I missing here?* Please provide your thoughts on this. Thanks!   -Arvind -------------------------------------------------------------- To reply to this message visit the message page: http://community.jboss.org/message/524066#524066