no issues from here,,
hope the jyoti had got the solution to her problem..
i want to mention that the in the TOOL library in optisytem… there is component named LOOP CONTROL>>>Allows you to build systems using loop structures
The loop topology starts at the Loop output port and terminates at the Loop input port. The signal enters the Input port and circulates in the loop N times, where N is defined by the parameter Number of Loops
hope now you have no problem in looping the signal
with regards