I have already checked the agent one of the computer (Home, the other is a mate's notebook in the office) and the stats tally up with the one on the website. Subsequent completed results by this computer are also processed properly ie given points. I will continue monitoring to see if this problem happens again.
Thanks.

Well, checked the computers and seems like everything is running as normal now. Oh well, just a pity that the points for those 2 results are missing. Would have been useful to boost up my stats...

Thank a lot for your help mycrofth

My first thought is that things like this can happen when a hardware error causes a glitch (software exception) that causes the program to abort. In these cases, I believe that UD.exe downloads both a new Work Unit AND a new copy of WCGrid_Rosetta.exe. The reason is that some malware might have damaged the software copy on disk, so UD.exe tries to eliminate that possibility. The download does not fix any hardware problem, of course.

Actually, WCGrid_Rosetta.exe is created for each new run from a copy in the main WorldCommunityGrid subdirectory labeled ud_nnnnnnn.exe and ud_nnnnnnn.dll, where nnnnnnn is a sequence of digits. I have never tried disassembly. I simply assume without checking that there is some encryption to discourage a prankster from creating a hacked copy to feed bad results back to the server. No need to make it impossible. That sort of juvenile personality usually lacks much persistence when there are so many websites and people that are easy targets.

This possibility can be checked by using Windows Explorer to go to C:\Program Files\WorldCommunityGrid and right-clicking on ud_nnnnnnn.exe, then selecting Properties to see what date it was actually installed on your hard disk. The date you see before you drill down to Properties is a published date. This is analogous to the difference between book publishing date, often shown in paperbacks, and actual printing date which printers never bother to stamp on a book, though they sometimes include a way to tell if it was the 4th printing or 5th printing, for example.

The current version of Rosetta was released on Saturday, 7 May 2005. It might not have been downloaded to your machine for a day or two. If your copy of ud_nnnnnnn.exe is dated yesterday or the day before, then this is what has happened. Several things can cause this. Hardware error; software problems such as malware; anything that corrupts the temporary results file on your disk such as a power failure while writing to it; or simply aborting WCGrid_Rosetta.exe using Task Manager, these are all possibilities. Now that I think of it, Task Manager is probably the most common cause where other people have access to the computer.

At least this gives you a date to check.

mycrofth

All right. Thanks for all your help. Will try to look into the problem...