TOPs: ROP Alembic output not reading ${WEDGENUM} attribute.

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My wedgenum attribute upstream in a wedge node is being output correctly (see screengrabs) but in the ROP Alembic output below it the $WEDGENUM attribute is always zero.
The files are being written but it's just overwriting the same file.

I've got “output.${WEDGENUM}.abc” in the Alembic file path, which is what the internet says I should have.
Anyone any ideas? I've been going around in circles.
Edited by lookbothways - Jan. 15, 2020 12:58:13

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wedgeSoap_v005.hiplc (167.7 KB)

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Can you access TOP attributes that way? I thought you had to use @wedgenum.
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