ERROR RIPPING PAGE

Everytime i launch ff portable i get my session saver choice,resume or clear.as soon as i push either button i get this message.
error ripping page:
exception component returned failure code:0x805200112(ns error file not found)[ns errorIFILEINPUTSTREA.init](ns error file not found)location;js frame::chrome://rip/content/rip.js::anonymous::line 1349
data no.
could someone please tell me how to get rid of it and what the hell it is?your help is very much appreciated.