I did a quick Google and all I could find was "Invalid
Floating Point Operation". Is this the same?
If it is, are you trying to Re-Join some files that you have downloaded? Ie. something.001, something.002, etc.
Please let us know what Operating System you are running and if your Alt.binz Log shows anything. I believe that you are running Alt.Binz 0.25, but could be wrong.
Not very much information to go by with what you have given us.