Bug? bugs on declarations

Hi.
i have some bugs on declarations.
on my old projects i have no problem, but on new projects i cant declare some objects

example

B4A version: 6.00
Parsing code. Error
Error parsing program.
Error description: Unknown type: countingoutputstream
Are you missing a library reference?
Occurred on line: 9 (DownloadService)
Type JobTag (Data As DownloadData, _

Click to expand...

i m using the same libs of my old projects, on my old projects i can compile without error.
on new projects i cant declare this object, this is in red.

Same for
Private ser As B4XSerializator

this is in red, but the lib its checked

i m using the last version beta 6.30
i m tryed to back to 6.0 version and the error still now.
error of 6.30 its now on 6.0

thx

It doesn't look like a bug. Is RandomAccessFile library checked?