this.contentWindow.kRid is a very large number and not the record_id of the table. This is part of the ScoobyDoo method. (4294967295)

This is now working, as designed.  I am not sure why it was returning the wrong kRID in the beginning. 

I am getting this same error message but cannot figure out how to fix it.  Did you ever figure out why you were getting this error?

my API_EditRecord returns:
<action>API_EditRecord</action>
<errcode>30</errcode>
<errtext>No such record</errtext>
<errdetail>Sorry, there is no record in this application table with the record identifier (rid)  of &quot;4294967295&quot;.</errdetail>

The API call is using <key> [Unique ID] </key> in place of rid.
[Unique ID] is the key field on the destination table and there is a matching field also called [Unique ID] on the source table.  I have triple checked that the values match.
This webhook worked fine on another table but then I had to replicate it on a new table and now it is throwing this error.  The main difference I see between the two (source) tables is that the new one that is not working is a connected table.

Any ideas are greatly appreciated.

That is a sentinel value of kRid when a new record is being created: 4,294,967,295 = 0xFFFFFFFF