本文给出IAR因版本不兼容打不开IAR工作区遇到的各种问题及解决方法，包括依据提示修改版本，删除未知名称(ewp文件)。若还没解决，则创建新工作区、工程，并拷贝相关文件，我想这是一种通用化的解决方法(很诡异)。
PS：本文以IAR工程项目ContikiCC2530Port为例，IAR for MCS-51版本是7.51A。本文记录了整个调试过程，实际场景，不妨先跳到第三部分，看行不行，不行的话，再按第二部分修改。
一、IAR错误提示
昨天，在GitHub下载了一个IAR工程项目ContikiCC2530Port，打开*.eww文件出现一系列错误，如下：
1.1 Broken options were detected in the project file.A backup copy will be made.
图1 IAR警告Broken options
1.2 The project file * was created by a newer version of project and cannot be opened
夏至的寓意和象征图2 IAR警告created by a newer version
1.3 The project * could not be open
图3 IAR警告could not be open
Build区域显示如下信息：
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': The format of this file is not supported by this version of the workbench.
It appears to have been written by a newer version of the workbench. Diagnostics: 'Settings 'General': unsupported version - '.
Options for 'General' will be set to default. Creating backup of original project file.
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'ICC8051': (Registry: unknown name: CompilerMisraRules04)
Options for 'ICC8051' will be set to default. 什么时候冬至
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'XLINK': The format of this file is not supported by this version of the workbench. It appears to have been written by a newer version of the workbench.
Diagnostics: 'Settings 'XLINK': unsupported version - '.
Options for 'XLINK' will be set to default.
如下图所示：
图4 IAR log windows信息
初步断定，这些警告是因为IAR版本不兼容引起的，但事实上没那么简单，之前也遇见用新版本IAR打开旧版本IAR我很快乐的歌词篮球过人技巧30招工程文件，可以直接打开(给出提示信息)，在这里还涉及到工打印机后台程序服务没有运行
程项目配置。解决方法是修改相关的IAR工程文件，描述IAR工程主要有.dep、.eww(Embedded Workbench Workspace)、.ewd(Embedded Workbench Debug)、.ewp(Embedded Workbench Project)文件。
dep --(我也不知道)
eww --工作区文件，描述工作区包含哪些project
ewd --C-SPY调试器项目设置文件
ewp --IA项目的配置信息
二、Broken options
Broken options是由于项目文件配置不对引起的，按提示信息修改。版本不对的，修改版本；unknown name的，则删去这些配置选项。
2.1 General
2.1.1 'Settings 'General': unsupported version
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General':
The format of this file is not supported by this version of the workbench. It appears to have been written by a newer version of the workbench.
Diagnostics: 'Settings 'General': unsupported version - '. Options for 'General' will be set to default. Creating backup of original project file.
(2)解决
一个IAR现版本可以开的工程文件，查看General的版本，并将工程文件的版本改成可支持的版本，如下图所示：
2.1.2 unknown name: PDATA 8-15 register address
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': (Registry: unknown name: PDATA 8-15 register address)
Options for 'General' will be set to default. Creating backup of original project file.
(2)解决
在.ewp文件到PDATA 8-15 register address，删去<option>...</option>，如下：
<option>
<name> PDATA 8-15 register address </name>
<state> 0xA0 </state>
</option>
2.1.3 unknown name: PDATA 16-31 register address
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': (Registry: unknown name: PDATA 16-31 register address)
Options for 'General' will be set to default. Creating backup of original project file.
(2)解决
同2.1.2，在.ewp文件到PDATA 16-31 register address，删去<option>...</option>
2.1.4 unknown name: General Far22 Heap Size
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': (Registry: unknown name: General Far22 Heap Size)
Options for 'General' will be set to default. Creating backup of original project file.
(2)恢复格式化文件解决
同2.1.2，在.ewp文件到General Far22 Heap Size，删去<option>...</option>
2.1.5 GeneralMisraVer
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': (Registry: unknown name: GeneralMisraVer)
Options for 'General' will be set to default. Creating backup of original project file.
(2)解决
同2.1.2，在.ewp文件到GeneralMisraVer，删去<option>...</option>
2.1.6 GeneralMisraRules04
(1)错误提示
LOAD: Configuration 'ContikiBankedRelease' in the project 'ContikiCC253xProj' contains broken options for tool 'General': (Registry: unknown name: GeneralMisraRules04)
Options for 'General' will be set to default. Creating backup of original project file.
(2)解决
同2.1.2，在.ewp文件到GeneralMisraRules04，删去<option>...</option>
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