My omnett++ simulation is stuck in a loop - omnet++

Question

Whenever I run my simulation the msg that is initial created at rdrchk1 gets stuck going between
rdrchk1 and rdrsucess1.
Here is my C++ code:
#include <string.h>
#include <omnetpp.h>
using namespace omnetpp;
class rdr : public cSimpleModule
{
protected:
// The following redefined virtual function holds the algorithm.
virtual void initialize() override;
virtual void handleMessage(cMessage *msg) override;
};
// The module class needs to be registered with OMNeT++
Define_Module(rdr);
void rdr::initialize()
{
int v1 = rand() % 100;
int v2 = rand() % 100;
int v3 = rand() % 100;
if (strcmp("rdrchk1", getName()) == 0) {
cMessage *msg = new cMessage("objectcheck");
if (v1<78|| v2 < 82 || v3 <69){
int n = 0;
send(msg, "out", n);
}
else{
int d=1;
send(msg, "out", d);
}
}
}
void rdr::handleMessage(cMessage *msg)
{
int t = 0;
send(msg, "out",t);
}
Here is my NED code:
simple rdr
{
parameters:
#display("i=block/routing");
gates:
input in[4];
output out[4];
}
//
network radr
{
#display("bgb=356,232");
submodules:
rdrchk1: rdr {
#display("p=85,67");
}
rdrfail1: rdr {
#display("p=275,133;i=block/wheelbarrow");
}
rdrsucess1: rdr {
#display("p=291,61");
}
connections allowunconnected:
rdrchk1.out[1] --> rdrfail1.in++;
rdrchk1.out[0] --> rdrsucess1.in++;
rdrchk1.in[2] <-- rdrfail1.out++;
rdrchk1.in[3] <-- rdrsucess1.out++;
}
I know it's stuck because whenever I edit my code so that it is guaranteed to go to rdrfail1 the next step it is stuck going between rdrchk1 and rdrsucess1. Can any one tell me why it is doing that and what I could do to fix it. Thank you for your time.

Answer 1

Here is what is happening in your model.
In initialize() of rdrchk1 a new message is created. Then that message is sent:
a. to rdrsucess1 when the condition if (v1<78|| v2 < 82 || v3 <69) is true
or
b. to rdrfail1 otherwise
If rdrsucess1 receives the message, it immediately sends that message to rdrchk1 (because in your network port with index 0 of gate out of rdrsucess1 is connected to rdrchk1).
If rdrfail1 receives the message, it immediately sends that message to rdrchk1 (because in your network port with index 0 of gate out of rdrfail1 is connected to rdrchk1).
Then rdrchk1 receives the message and sends it immediately to rdrsucess1.
Then points 2 and 4 are repeated endlessly.