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Entry type: FAQ Entry ID: 22557801, Entry date: 08/18/2006

How do you clear the error message "OS is currently being loaded from other ES"?

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An abortion of the loading of the OS might lead to an error message appearing the next time you attempt load the OS.

The error message "OS is currently being loaded from other ES" is displayed when the "Load OS" function is started.

The reason for this is that there is a file with the ending "LCK" on the source and/or target station. This file is created during the loading procedure and is then deleted again. If a loading procedure is interrupted for whatever reason, this file might not be deleted. In this case you must delete the file manually on the source and/or target station. Search the ES and OS stations for files with the extension "*.LCK" and delete them.

Make sure that no "*.LCK" file remains in the Trash or Recycle Bin.


  • In earlier versions of PCS 7 the WINCC.LCK file was created during loading.
  • In PCS 7 V6.1 and higher the <Project_name>.LCK  file is created in addition in the project path.

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