Does anyone know how to plot &mdl.generic.cblprms.value into a repeat region of Creo Drawing?

@ptc-748332 where was this found?

we have list here at top level https://www.ptc.com/en/support/article/CS133915

at bottom, there is reference to harness, flat harness mfg, and cabling parameters info as well. I browser around and searched help and did not see such a parameter listed

mdl is for top model/part

I'd expect maybe parameters at top level of family tabled harness part perhaps.  and by the way family table repeat regions work, you might need a 2D repeat region to make it populate where you have maybe model name, parameter name, and then parameter value like this article https://www.ptc.com/en/support/article/cs24968 (see step #9)