解决OMP：Error #15：Initializing libiomp5md.dll, but found libiomp5md.dll already initialized.报错问题_omp: error #15: initializing libiomp5md.dll, but f-优快云博客

本文链接：https://blog.youkuaiyun.com/Argulo/article/details/131518454

在运行前馈神经网络的Python代码时遇到OpenMP初始化错误，原因是多个OpenMP运行时库被链接。通过搜索并移除多余的libiomp5md.dll文件解决了问题。另外，一个变量名写错导致的数据类型不匹配的RuntimeError，通过修正变量名成功消除错误。

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1.今天在运行前馈神经网络的python代码的过程中遇到了标题中的问题，会有两条报错信息，具体如下：

 
 OMP: Error #15: Initializing libiomp5md.dll, but found libiomp5md.dll already initialized.
 OMP: Hint This means that multiple copies of the OpenMP runtime have been linked into the program. That is dangerous, since it can degrade performance or cause incorrect results. The best thing to do is to ensure that only a single OpenMP runtime is linked into the process, e.g. by avoiding static linking of the OpenMP runtime in any library. As an unsafe, unsupported, undocumented workaround you can set the environment variable KMP_DUPLICATE_LIB_OK=TRUE to allow the program to continue to execute, but that may cause crashes or silently produce incorrect results. For more information, please see http://www.intel.com/software/products/support/.

解决问题的方法是在Anaconda的的安装路径中使用everything软件搜索libiomp5md.dll文件，发现C盘的用户路径中有两个这样的同名文件，我把Library\bin\libiomp5md.dll的文件剪切到桌面备份后后再运行代码就没有问题了。

2.解决RuntimeError: mat1 and mat2 must have the same dtype.报错问题

这个问题最后通过检查代码中，有一个变量名写错导致，更改正确后再运行代码就没有报错。