Hi Simon,
you are correct that "Castka" is FieldLabel and not FieldName which is "CASTKA".
Anyway other field types I use (Text, Date) are working with 'FieldLabel' in 'dbname' so it is not seems like case sensitive.
Also I tried format
<Field dbname="CASTKA" type="Decimal" culture="cs-CZ" decimalPlaces="2" value="64544,56" />
and
<Field dbname="CASTKA" type="Decimal" culture="en-Us" decimalPlaces="2" value="64544.56" />
And result is still same, value is not imported do Docuware even if import is successful (no errors appears in LogCollector).
When I looked to History\Document in WebClient, record is stored without "Castka" field - means all other 'dbname' fileds are imported correctly.
There is probably some bug because when I imported it with different (wrong) format I received error, so import and format seems to be OK.