rosThreadCreate uns once?

Unless something else outside my main would cause this (middle ware or like) I'm out of ideas why this is not looping.

in h file
osThreadId KA;

in main project

osThreadDef(KA_CODE_MS, osPriorityNormal, 1, NULL);

KA = osThreadCreate (osThread(KA_CODE_MS), NULL);osDelay(200U);
while(1)
{
        printf(".");

}

void KA_CODE_MS(void const *arg)
{
        CANWrite_MS(ECU_ID_GM_1, ka);
        osDelay(1000U);
        printf("KA MS\n");
}

the code runs then outputs the following text and seems to continue to run according to the debugger but prints nothing further. CANWrite_MS is also only shown once on the CAN wire.

..................(many more dots).........................KA MS