The safety-related project relating to a Safety Logic Controller is automatically opened when starting Machine Expert - Safety in the Machine Expert 'Devices' tree for that particular Safety Logic Controller (context menu item 'Machine Expert - Safety > Edit Project'). There is no 'File open' menu item/toolbar icon available in Machine Expert - Safety.
Message box 'Absolute project path is too long!'
The absolute path length to the directory containing the safety-related project is limited to a maximum of 255 characters. If a project is, for example, stored on a network drive in a deeply nested directory structure, Machine Expert - Safety may be unable to open the project. A message box informs you about the exceeded path length.
As the safety-related project is part of the standard project (contained in a subfolder), you have to save the Machine Expert standard project in another directory with a shorter absolute path.
When opening the safety-related project, the list of safety-related devices is synchronized between Machine Expert and Machine Expert - Safety. If any inconsistencies between the Machine Expert 'Devices' tree and the Machine Expert - Safety device tree are detected (because the bus configuration has been modified by deleting, adding or replacing safety-related devices in Machine Expert), you have to (1) confirm each modification in a dialog referred to as 'Confirm changed SDIO Devices' and then (2) confirm the dialog with 'OK' as shown in the figure below.
Machine Expert - Safety project is part of Machine Expert project:
After closing the safety-related project or exiting Machine Expert - Safety, the safety-related project is automatically integrated into the Machine Expert project. If you have edited an already existing safety-related project, the Machine Expert project is updated accordingly by these modifications.