Thank you for the post.
FileMaker Server can only import from and Export to the following locations:
When using the Import Records script step or Export Records script step in a FileMaker Server scheduled script, keep the following in mind:
Any specified file must be in the Documents folder, the temporary folder, or a child folder of either the Documents folder or the temporary folder.
For example, the following are all valid paths for file.csv:
For more information see FileMaker's Knowledge Base article 7035:
Thank you, that was the issue! (and the solution)