matlab simulink 仿真 模型图运行时 错误 2个错误 求解

Question

1. Error using ==> rtw_checkdir>ErrorIfInSlprjDir
Aborting code generation because current working directory,
'E:\matlab2\work\slprj\grt\untitled\tmwinternal\slprj'
is an existing Real-Time Workshop project build directory. Please change
current working directory to a non-project directory.
2. Error building Real-Time Workshop target for block diagram 'untitled'. MATLAB error message:
Error using ==> slbuild
Error using ==> rtw_checkdir>ErrorIfInSlprjDir
Aborting code generation because current working directory,
'E:\matlab2\work\slprj\grt\untitled\tmwinternal\slprj'
is an existing Real-Time Workshop project build directory. Please change
current working directory to a non-project directory

Answer 1

Aborting code generation because current working directory,
'E:\matlab2\work\slprj\grt\untitled\tmwinternal\slprj'
is an existing Real-Time Workshop project build directory. Please change
current working directory to a non-project directory
这句话就说明了你把你的Real-Time工程放到另一个已经存在的Real-Time工程目录中了，说明你以前就在当前目录 'E:\matlab2\work\slprj\grt\untitled\tmwinternal\slprj'建立过Real-Time工程。你要把要运行的Real-Time工程放到另外一个文件夹下，应该就可以了～

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Answer 2

把文件重新放到一个文件夹下，关闭matlab再运行一次看看，当前工作路径要选择更改后的路径

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我在matlab 文件夹下 建了一个 新建文件夹 把模型图放在里面 运行后 有三个错误 ： 1 The specified Real-Time Workshop target cannot be used with a variable-step solver. You must configure the solver options for a fixed-step solver with an appropriate integration algorithm. (press Open)
这是第一个 ，图片你看一下 可以留下联系方式吗 791 69 1395 加我扣扣吧

追答

就是不能用变步长的方法做，只能定步长

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怎么定步长 ，具体操作方法 谢谢