最新协议栈取消MT_TASK无法编译？

我刚下了最新的协议栈(Z-Stack Home 1.2.2a.44539)，使用SampleSwitch例程，把MT相关的预编译取消掉

预编译如下：

SECURE=1
xTC_LINKKEY_JOIN
xNV_INIT
xNV_RESTORE
xHOLD_AUTO_START
ZTOOL_P1
xMT_TASK
xMT_APP_FUNC
xMT_SYS_FUNC
xMT_ZDO_FUNC
xLCD_SUPPORTED=DEBUG
MULTICAST_ENABLED=FALSE
ZCL_READ
ZCL_WRITE
ZCL_REPORT
ZCL_EZMODE
ZCL_BASIC
ZCL_IDENTIFY
ZCL_ON_OFF
ZCL_DIAGNOSTIC
FEATURE_SYSTEM_STATS

然后我用IAR编译的时候发现编译不通过，具体如下：

Building configuration: SampleSwitch - CoordinatorEB 
Updating build tree... 
Linking 
Error[e16]: Segment XDATA_I (size: 0xaf align: 0) is too long for segment definition. At least 0x2b more bytes needed. The problem occurred while processing the 
segment placement command "-Z(XDATA)XDATA_Z,XDATA_I=_XDATA_START-_XDATA_END", where at the moment of placement the available memory ranges 
were "XDATA:1e7c-1eff" 
Reserved ranges relevant to this placement: 
XDATA:1-300 XSTACK 
XDATA:301-1eff XDATA_Z 
BIT:0-7 BREG 
BIT:80-87 SFR_AN 
BIT:90-97 SFR_AN 
BIT:a0-af SFR_AN 
BIT:b8-c7 SFR_AN 
BIT:e8-ef SFR_AN 
BIT:f8-ff SFR_AN 
Error while running Linker 

Total number of errors: 1 
Total number of warnings: 0

请求解决方法，或者有没有方法使串口不自己添加些MT数据

P.S. 只要把MT_TASK去掉就会出现以上情况

MT_TASK使能，但是可以把MT里面的串口初始化去掉的