Moving Object to other objects

I have 2 objects, Object A report its pos to object B with this:

vector objectlocation = llGetPos();
llSay(0, "" +(string)objectlocation);

Object B get the info with this:

llListen(0, "", "", "";
listen(integer channel, string name, key id, string message)
{
llSay(0, "I See Object A at: " +(string)message);
}

Object A gets its pos, converts the vector into a string in the llSay, I need to convert the string from the listen back to a vector for a llMoveToTarget() command.

Casting message to a string in your listen is pointless as it is already a string, but that is is the correct approach. Try casting the string back to a vector

listen(integer channel, string name, key id, string message)
{
        vector v = (vector)message;
        llSay(0, "I See Object A at: " +(string)v + "   (" + message + ")");
}