using parameter to reference column in custom column

[DaveBlakeMAAT]

Hi

I have a parameters PQ function which is used to dynamically renames column, which is working great, however I am having trouble using the parameter in a custom column formula to reference the column name, my objective is to create the custom column so i can use to filter unwanted records.

I've tried the following:

if(
            "[" & RPText12 & "]" = 0 and "[" & RPText11 & "]" = 0 )
        then
            "Remove"
        else
            "Keep"

if(
            RPText12 = 0 and RPText11 = 0)
        then
            "Remove"
        else
            "Keep"

what i am trying to achieve is a parametrized version of the following:

if(
            [Sep 20] = 0 and [Oct 20] = 0 )
        then
            "Remove"
        else
            "Keep"

Thanks in advance for any assistance.

Regards

Dave