Still researching after two years?
I'm not sure what you are suggesting - but IIRC the issue described here was fixed in the next LPCXpresso IDE release, a month or so after this thread was created.
If you are having problems with attach yourself, I would suggest creating a new forum thread, and posting full details - including what MCU you are using and what version of LPCXpresso IDE (or MCUXpresso IDE) you are using.
Regards,
LPCXpresso Support