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Inconsistent Library ID

Each library can be identified by its library ID. When opening a project, PLCnext Engineer verifies the ID of each included library by comparing the IDs stored in the project with IDs in the library files.

Note On re-releasing a library in PLCnext Engineer, you can specify in the export dialog whether the new library version shall have the same ID or a new one (checkbox 'Create new library ID'). The library ID is different from the signature checksum. The checksum is always recalculated each time a library is released - independently of the setting for the checkbox 'Create new library ID'.

If the library file has a different library ID as stored in the project, it is no longer valid in the current project and an error icon appears at the 'Libraries' folder  as well as at the library symbol . In this case, the content of the modified library is still loaded and the elements it contains can still be used in the project.

To acknowledge the modified library in PLCnext Engineer, right-click the respective library node and select 'Acknowledge Library' from the context menu.