[R] pscore.dist problem when running optmatch

[MA]

Hello

My optmatch package is loaded and otherwise running fine.
I get an error after lcds successfully completes logistic regression and
I'm trying to obtain a propensity score:

> pdist <- pscore.dist(lcds)
Error: could not find function "pscore.dist"

I searched the help files, other online sources, could find no answer for
this.
Any advice would be greatly appreciated!

Thank you
Michael Adolph