When a user try to edit an experiment, an error message is displayed:

That's mean that the user didn't correctly close the experiment or did not logout.

A Functional Admin can unlock experiments:

• Connect to the E-Workbook client
• Open the "Configuration" menu:
  
  

• Open the "Locked Entities" tab:
  

• Find the related experiment, select it and unlock it: right click on the line and "Unlock Selected Entity"
• 

• Confirm: