tasker运行shell 启动应用失败 提示错误255，如图

tasker运行shell 启动应用失败
提示错误255，如图。
10.06.27/E 运行Shell命令: ->
10.06.27/E 运行Shell命令: ->
10.06.27/E 运行Shell命令: ->
10.06.27/Shell runBackground am start -n com.autonavi.minimap root: true timeout: -1
10.06.27/Shell start process-thread ID 34915
10.06.27/E add wait type Shell1 time 2147483647
10.06.27/E add wait type Shell1 done
10.06.27/E add wait task
10.06.27/E 错误: 255