项目是集成在step7里的，之前好好的，后来强行关机，再打开改项目，就提示内部错误，按照帮助做了修改。修改如下：
To Correct or Avoid Error:

1. Close all STEP 7 applications except the SIMATIC Manager.

2. Use the menu command File> Save As and the "With reorganization (slow)" option to create a copy of the project, which you can use to continue your work. However, this copy may not contain all the data from the original project because of the defects in the existing project.。