Nobody helps ?
have you checked the link I have provided? There are some workarounds listed.
Then, check Re: Minor bug when entering data directly into tables in SQL worksheet . Same error reported, but at least some additional interesting info: "Actually, this seems to be fixed in the main code line already, so please use the workarounds until whenever the next release gets posted on OTN."
i just confirmed the bug fix is good, we're working on getting an update out soon that will address the biggest issues found in the 4.2 release.
thanks everyone for your patience.