Is this module currently included in plumed2.9?

[JinyinZha]

Hello~
I am attempting to use the ann_func module in plumed. I have added "--enable-modules=annfunc" during in configure. No relative warnings (or even other related information) were shown. The only thing I found is a line in config.log as "configure:2488: Enabling module annfunc". After compiling and installing plumed, the program tells me that ann is not available in plumed.

+++ ERROR: You are trying to use an invalid plumed object. +++
+++ Check your PLUMED_KERNEL environment variable. +++

What`s wrong? I am looking forward to your reply~ Thank you~

[JinyinZha]

Well, in fact I have found ANN.o in the source directory (plumed-2.9.0/src/annfunc). Still, it doesn't work.