# Calling a Real-Time Sequence from Another Sequence

Call real-time sequences by reference to run multiple sequences in parallel.

You can add references to real-time sequences or CSV files that you call as sequences, and then call those references from expressions within an existing sequence.
1. Create a real-time sequence to serve as the calling file.
2. In the References pane, select References.
3. On the Home tab of the ribbon, click Reference.
4. Use the File dialog box to navigate to the real-time sequence (.nivsseq) or CSV file you want to reference.
Note

If the real-time sequence or CSV file is saved in the same directory as the sequence you are editing, you can also drag the real-time sequence or CSV file from the Sequences pane to References to create the reference.

After you add the reference, you can use an expression to call the referenced real-time sequence.