Can't get Export LUT batchPlay code

[JasonM]

My understanding is that the negative ones should not be used as they can easily change in future photoshop versions.

Edit (found reference):

How reliable are Filters menu commands?

Negative IDs are not guaranteed to be persistent between Ps versions – and not even between users. I’d use the menu text instead (although you will have to worry about localization, since that text can changes w/ locals)