Reference data not found on local server

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Dear WDMTech,

I have "Update" import profile, with a field is defined as ReferenceTo, to obtain the "series_id" value.
The update operation involved about 2,000 records, and I see about 70 lines of these "reference data not found on local server".
After that I use SQL left outer join to find out which records have no series_id filled in. To my surprise I found none. It seems all of them have series_id properly matched.
Would you help me why I got those error message? It is a pity that the logs themselves do not tell what values got un-matchable.

Regards,

2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:48+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server
2016-05-23T01:36:54+00:00 ERROR 192.168.1.191 com_vdata series_id - reference data not found on local server