DB Lookup not finding the rows.

Greetings from warm Florida.

I have a simple transformation:

(staging) Table input -> db lookup 1 (find internal cust_id in xref)-> db lookup 2 (based on internal cust_id find customer)

Fields:
Staging table ( ext_cust_id STRING(15))
xref table (ext_cust_id STRING(15), cust_id NUMBER)
cust table (cust_id NUMBER,...etc)

From staging table I get an external customer id, find the internal id in the xref table and use it to find the custmer data with the internal_id found.

My issue: after finding the internal id, the last step does not find the customers even when they do exist.
I thought perhaps it was conversion issue because the internal_id is converted to "BigNumber" by Pentaho.

My request: is there a way to debug this?
:confused: