Resolution:
Description:
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Attempting to modify a record with an attribute defined as type date of value 0001-01-01 (YYYY-MM-DD) results in an error:
    GEN-7056: Error converting string Übernahme Datum to date for attribute 1-01-01 00:00:00.

Environment:
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All TIBCO Collaborative Information Manager versions.
All platforms hardware and virtual.

Cause:
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This is a limitation of the UI.  Internally the date is stored as java Date, which is defined as:
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A thin wrapper around a millisecond value that allows JDBC to identify this as an SQL DATE value. A milliseconds value represents the number of milliseconds that have passed since January 1, 1970 00:00:00.000 GMT.
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Resolution:
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Be sure all dates are later than January 1, 1970 00:00:00.000 GMT.  If earlier dates are required, a string attribute can be used.

Error on validating a Date type attribute.