"Negative file size for archive x" is a common error after RuneScape updates for the TRiBot Client. These updates usually occur on Thursday.
How To Solve It
To fix the "Negative file size for archive x" error, restart your TRiBot client twice, loading a normal client both times. After the second load the client should continue to function normally.
How to Prevent It
At the time there is no known prevention for this error.