it just seems you didn't post all the log...
usually it goes
L 07/30/2009 - 14
9:52: SourceMod error session started
L 07/30/2009 - 14
9:52: Info (map "pl_goldrush") (file "errors_20090730.log")
L 07/30/2009 - 14
9:52: [SM] Native "some native" reported: some error
L 07/30/2009 - 14
9:52: [SM] Displaying call stack trace for plugin "some plugin.smx":
L 07/30/2009 - 14
9:52: [SM] [0] Line ####, some plugin.sp::Some function()
That 3rd line is the most important.