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RTOS/TM4C123GH6PM: Execution graph shows unknown with a gray line

Part Number: TM4C123GH6PM

Tool/software: TI-RTOS

/* ================ General configuration ================ */
var Defaults = xdc.useModule('xdc.runtime.Defaults');
var Diags = xdc.useModule('xdc.runtime.Diags');
var Error = xdc.useModule('xdc.runtime.Error');
var Log = xdc.useModule('xdc.runtime.Log');
var Main = xdc.useModule('xdc.runtime.Main');
var Memory = xdc.useModule('xdc.runtime.Memory');
var System = xdc.useModule('xdc.runtime.System');
var Text = xdc.useModule('xdc.runtime.Text');

var BIOS = xdc.useModule('ti.sysbios.BIOS');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
var Semaphore = xdc.useModule('ti.sysbios.knl.Semaphore');
var Hwi = xdc.useModule('ti.sysbios.hal.Hwi');
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
//var FatFS = xdc.useModule('ti.sysbios.fatfs.FatFS');

/* ================ System configuration ================ */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
var Swi = xdc.useModule('ti.sysbios.knl.Swi');
System.SupportProxy = SysMin;

/* ================ Logging configuration ================ */
var LoggingSetup = xdc.useModule('ti.uia.sysbios.LoggingSetup');

/* ================ Kernel configuration ================ */
/* Use Custom library */
var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.libType = BIOS.LibType_Custom;
BIOS.logsEnabled = true;
BIOS.assertsEnabled = true;
var hwi0Params = new Hwi.Params();
hwi0Params.instance.name = "Timer_2A_INT";
Program.global.Timer_2A_INT = Hwi.create(39, "&Timer_ISR", hwi0Params);
Program.stack = 1024;
BIOS.heapSize = 0;
BIOS.cpuFreq.lo = 40000000;
var swi0Params = new Swi.Params();
swi0Params.instance.name = "LEDSwi";
swi0Params.priority = 1;
Program.global.LEDSwi = Swi.create("&ledToggle", swi0Params);
Swi.numPriorities = 32;
LoggingSetup.sysbiosSwiLogging = true;