IAR building tree aborted

[mojijafari]

Dear formtapez,

Thank you very much for your amazing project. I am new in the zigbee and read your very good project, but I have some problems with the compilation part. could you please explain more?
I have a problem with IAR, always show the message like this:

Building configuration: ZigUP - EndDeviceEB
Updating build tree...
Build error: Multiple tools write to the same file.
File: C:\Texas Instruments\Z-Stack 3.0.0\Projects\zstack\HomeAutomation\ZigUp\src\ZigUP\CC2530DB\EndDeviceEB\Obj.r51
Tool 1: Assembler, when processing C:\Texas Instruments\Z-Stack 3.0.0\Projects\zstack\Components\osal\mcu\cc2530\OSAL_Math.s51
Tool 2: Assembler, when processing C:\Texas Instruments\Z-Stack 3.0.0\Projects\zstack\HomeAutomation\ZigUp\ZMain\TI2530DB\chipcon_cstartup.s51

Build aborted.

Thank you very much in advance.