Troubleshooting a batch action executed from Bridge

An action I've created that runs well from inside Photoshop is not behaving in the same way (or so it seems) when triggered via Bridge/Tools/Photoshop/Batch. In short, the action processes an image layer through a color fill layer, stepping through 10 blend modes, "merging" each combination to a new layer before proceeding to the next blend. Then, it executes the "Layers to File" script, exporting those ten layers to a specified destination folder, and finally, closes the original file without saving changes to the file. Works as expected and intended inside Photoshop. Triggered from Bridge, it executes the multiple blend mode layers fine, but when it tries to run the "Layers to file" to save to a folder, it stops with a "duplicate image "dialog box. I've tried various options and overrides in the Batch dialog box, but I get a little lost trying to understand what's actually happening. I'm sure it's GIGO, but not sure why. Thoughts?