Issues when using String to Path node in batch mode

I have created a simple 2 step workflow which defines a variable (a directory path) and then converts same to a Path using the String to Path node. The workflow completes successfully when using the UI but fails in batch mode. This issue occurs when the ‘File system’ setting is either: ‘Local File System’, ‘Relative to’ ‘Current workflow data area’ or ‘Current Workflow’. I understand that mountpoint paths aren’t available in batch mode but cannot find anything to suggest that there are limitations when using simple paths.

Using the ‘non-variable’ variant of the node generates the same error.

Attached is the workflow and an image of the error message being generated.

TEST.knwf