Flash Builder 4.6 - error without path, can't trace

Question

I have to work with decompiled code, I had only few original files, so I replaced them, fixed all errors, warnings. Finally, I have this:

Why? What might be wrong? Those errors are like pointing to nowhere. I've checked every file, line by line, but no clue. Seems like all imports are correct.

Answer 1

It was internal Flash Builder error. I resolved it, removing all hardcoded pathes from class, like: com.blablabla.blablalba.class.getSomeFunction()