Hi,
thanks for any assistance on the following situation:
I've set up a study, initialized an 'Advanced Specimen Repository' with data editable and requensts enabled, intending to populate the repository via upload/import of external data (just Excel file, no external software, not a LabKey archive, but columns as exported from demo repository or from own repository with two manually incerted specimen).
Whenever uploading and then importing a specimen file the system indicates a successful import process, at least it says 'COMPLETED'. Looking into the log file reveals, that no Patient ID was found:
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28 Jan 2018 14:23:22,690 INFO : Starting to run task 'org.labkey.study.pipeline.StandaloneSpecimenTask' at location 'webserver'
28 Jan 2018 14:23:22,706 INFO : Unzipping specimen archive C:\Program Files (x86)\LabKey Server\files\FCCM\@files\SpecimenRepository\SpecimenFake_2018-01-28_12-15-56.specimens
28 Jan 2018 14:23:22,721 INFO : Expanding specimens.tsv
28 Jan 2018 14:23:22,753 INFO : Archive unzipped to C:\Program Files (x86)\LabKey Server\files\FCCM\@files\SpecimenRepository\180128142322721
28 Jan 2018 14:23:22,768 INFO : Starting specimen import...
28 Jan 2018 14:23:22,893 INFO : Creating temp table to hold archive data...
28 Jan 2018 14:23:23,112 INFO : Created temporary table temp.SpecimenUpload$445bcbace64f1035ac18e39b7fd70b50
28 Jan 2018 14:23:23,112 INFO : Populating specimen temp table...
28 Jan 2018 14:23:23,143 INFO : temp.SpecimenUpload$445bcbace64f1035ac18e39b7fd70b50: No rows to replace
28 Jan 2018 14:23:23,159 INFO : Found no specimen columns to import. Temp table will not be loaded.
28 Jan 2018 14:23:23,253 INFO : Created indexes on table temp.SpecimenUpload$445bcbace64f1035ac18e39b7fd70b50
28 Jan 2018 14:23:23,253 INFO : Specimens: 0 rows found in input
....
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Patient ID is available in each of the different xls-tables tested for import. Nothing shows up in the specimen list anyway.
What is the problem I'm facing? What is it I didn't extrct from the documentation?
Thanks for any hint!

Claudius