Thanks a lot for the replies, and I'm terribly sorry for the typo errors - I had used the right syntax in the code, made a mistake while typing it here (and it had still not worked for me). I tried whatever was suggested here, but in vain. Then i realised the problem is with "eval" - I believe since eval executes everything given to it as if it were a separate script, and since the code said " eval 'use P4' ", the changes to @INC or the "use lib" was not visible to it and was hence picking the old path itself. I changed " eval 'use P4' " to

eval {
  use lib 'path2';
  use P4;
};
[download]

and it started picking up the right path (path2) :)

Cheers,
srinigs