Call Business Object Within BPM Using C# - Help Needed

Currently, the code only checks out a part and unapproves it. The ECORev.RevShortDesc and ECORev.RevDescription are there so that I can see that something is happening table-wise when I do the checkout.

Also, this is all being done in our pilot system not live so no worries about breaking stuff here.

Also I have a partial solution to why the error is happening:

The code I’m creating here is based on the works of @NateS. In his post above he mentions that the row mod for tsWB needs to be marked as “U” before the unapproved method can be called.

However when I try to go into tsWB.ECORev.RowMod I get the following error:

Any ideas on how I can swap the RowMod on this sentax-wise?