ProtocolError ：（“连接已中止。”，BadStatusLine（“''”，）），同时在机器人框架中多次迭代测试用例吗？

Question

我试图多次迭代测试用例中的登录，但是第一次登录后，它无法再次登录，我遇到类似以下的错误：ProtocolError：（'Connection aborted。'，BadStatusLine（ “”“，））

这是我的测试用例：

Signin-Personal-Account
    [Tags]  Tvh2
    Given Number of users signs in to their respective devices  ${xyz}
    Then xyz sees that Sign in is successful
    When xyz signs out from the device
    Then xyz sees that sign out was successful   
    And Signin is repeated for 5 times for xyz

以下是关键字：

Multiple sign in
  Killing Appium Process
  ${marf4}  Start Process  ${appium_start}  shell=${True}  stdout=C:\\stream\\appium.txt  stderr=C:\\stream\\appiumerr.txt
  Log  ${marf4}
  ${marf5}  Is Process Running
  Log  ${marf5}
  Should Be Equal  ${marf5}  ${True}
  Sleep  10s
  Number of users signs in to their respective Devices
  xyz signs out from the device

Signin is repeated for ${number} times for ${caller}
  :FOR    ${index}    IN RANGE   5
  \    Multiple sign in

我希望它会在测试用例中重复执行5次，但没有发生，我也尝试过重复关键字，但是我也遇到了同样的问题。有什么工作要做吗？