Action add to comment ThisRow_Before column value and ThisRow_After

[Markus_Malessa]

I have reviewed the release notes here

Release notes: 7/14/20 Feature Release Notes

When I try to use this in an Action Condition, I get this Error: Error in expression '[_THISROW_BEFORE].[Charge]' : Unable to find column '_THISROW_BEFORE'

but I am uncertain how to make an action work that would add to my previous Remarks column the value of a column in its before and after state.

I am using this expression:
CONCATENATE([_THISROW_BEFORE].[Remarks], " ", "Reassigned from ", [_THISROW_BEFORE].[Tech], " to ", [_THISROW_AFTER].[Tech], " on ", TODAY(), ".")

It seems like within the action expression to change the value of a column [_THISROW_BEFORE] or after is not even recognized, but when I rewrote the process in a bot, the expression was valid but the before [Tech] and after [Tech] values are the same.

Any help would be appreciated.

[Marc_Dillon]

Not sure if this is your issue, but you should just use [Tech] instead of [_THISROW_AFTER].[Tech].

[Markus_Malessa]

Thanks for the suggestion. I tested that and unfortunately that did not make any difference.