The case is user use 0x1} as a hex value for Pcd, it directly cause tool report traceback info. This patch add more error info. Cc: Liming Gao <liming.gao@intel.com> Cc: Yonghong Zhu <yonghong.zhu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com> Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>