keil5显示Target not created.

问题遇到的现象和发生背景

keil5报错
Build started: Project: 123
*** Using Compiler 'V5.06 update 7 (build 960)', folder: 'C:\Program Files (x86)\ARM_Compiler_5.06u7\Bin'
Build target 'Target 1'
compiling main.c
Error: C9555E: Failed to check out a license
The license file could not be found. Check that ARMLMD_LICENSE_FILE is set correctly
ARMLMD_LICENSE_FILE is not set. You must set this to the path to your license.
Information about this error is available at: http://ds.arm.com/support/lic87/m1
General licensing information is available at: http://ds.arm.com/support/licensing/
Product: ARM Compiler 5.06
Component: ARM Compiler 5.06 update 7 (build 960)
Tool: ArmCC [4d365d]
".\Objects\123.axf" - 1 Error(s), 0 Warning(s)
Target not created
Build Time Elapsed: 00:00:00

操作环境、软件版本等信息

V5.30

尝试过的解决方法

把高版本的卸了换成现在的版本；魔法棒编辑器6改成5；注册机也重新搞了