Writing testcase to confirm counter signal values in CAPL - capl

Question

I am writing a basic CAPL test to check if a message counter is counting correctly with each cycle. I am trying the test case in simulated bus now, however whenever I check for the counter signal value using write() function I always get '0'and the signal value check always fails inside the loop. Why can't I see the signal updating in my testmodule at all although in the trace and the graphics it's updating correctly?
Here's the test module code below:
variables
{
float counter1AB;
int values [257];
int count;
long result;
long cntResult;
}
void MainTest()
{
//ChkConfig_Init("user");
TestModuleTitle ("Cyclic time & Process counter check");
TestModuleDescription ("Check the value of messages process counter is changing correctly.");
TestModuleDescription ("Message ID Tested: 0x1AB");
TestModuleDescription ("separate test cases.");
TestGroupBegin("message 0x1AB", "Check the process counter values for message 0x1AB");
TC_MSg_1AB_first_value();
write("signal value is %d", $Sig_cnt);
testGroupEnd();
}
testcase TC_MSg_1AB_first_value()
{
counter1AB=0;
//check message 1AB recieved
result = TestWaitForMessage(Av_VdsToSte1Scnd, 10000);
cntResult = checkSignalMatch(Sig_cnt,counter1AB);
if (result > 0){
testStepPass("1.1","Message 0x1AB recieved for first time");
}
else{
testStepFail("1.1","Message 0x1AB wasn't recieved for first time");
}
if (cntResult > 0){
testStepPass("1.2","Message 0x1AB recieved with counter = %d ",counter1AB);
}
else{
testStepFail("1.2","Message 0x1AB recieved with incorrect counter");
}
//check that we have 255 subsequent transmissions afterwards
for (count=0; count < 255; count++){
result = TestWaitForMessage(0x1AB, 53);
cntResult = checkSignalMatch(Sig_cnt,count+1);
if (result > 0){
testStepPass("1. %d","Message 0x1AB received for the %d th time",count+3,count+2);
}
else{
testStepFail("1.%d","Message 0x1AB wasn't received for the %d th time",count+3,count+2);
}
if (cntResult > 0){
testStepPass("1.%d","Message 0x1AB received with counter = %d ", /*count+4,*/ count+1);
// write("signal value is %d", $Sig_cnt);
}
else{
testStepFail("1.%d","Message 0x1AB received with incorrect counter", count+4);
//write("ExpectedValue= %d",count +1);
}
}
write("signal value is %d", $Sig_cnt);