Error "deleted key is not found"

[Richard Tartaglia]

Hope all is well with everyone.

FP 5.0.14  , Windows 

I am attempting to write an auto posting table. 

A person in my files may have many records or just 1. 
Some of those records may be posted as paid and some
not.

Index B is sorted on the name, field(1), and date paid
field(2). When typing a persons name you will see the
unpaid records first because the payment date is
blank. 

When standing on a record, key P activates the table
with @keyP processing.

  @keyp : '@keyP
        :
        :nm(60)=1 ' set name 
        :
  post  :lookup test k=nm I=B -nx
        :not test
        :input popup yn "There is a problem"
        :not test
        :end
        :test(1)=nm and test=""
        :test(2)=@t4 ; test(40)=Test(44)'date amount  

        :
        :write test              
        :
        :goto post
        :
        :end

This works for until it gets to the last unpaid record
and I get an error

        Deleted key is not found
        Index = test/index.B
        Key="Bean  Mark J  "
        Recno=1
        tptr=2,1,2,1,0

I have never seen this error before and I am so good
at this I thought I had seen them all.
I think it is because I am looking up the record with
the same index I am using for the lookup. 

Any help would be appreciated so I can get back to
playing with my toys.

Thanks 
Rich Tartaglia