3 of 6 deleted 13 characters in body

JavaScript, 103 101 99

This implementation is based on primo's comprehensive description of the algorithm he used.

for(x=prompt(e=l=1),g=1e5;--g;y=x>1?1-1/x:x-1,l=y/g+(y<0?-y:y)*l)
    e=1+e/g*x;
alert([e,x>0?l:"ERROR"])

Edit: Trying to catch Perl. Stole a byte back from primo by copying his branch. :)