cast(Z.EtikettBenutzerfeld_1 as memo) <> cast(Q.EtikettBenutzerfeld_1 as memo)

where EtikettBenutzerfeld_1 is a Blob field.

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 Comments

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The problem was that DBISAM was not properly adding a NULL byte at the end of the string created by the CAST, thus causing any subsequent string comparisons to be indeterminate.

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 Resolution

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Fixed Problem on 9/18/2012 in version 4.34 build 1

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 Products Affected

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DBISAM Additional Software and Utilities
DBISAM ODBC Client-Server
DBISAM ODBC Client-Server with Source
DBISAM ODBC Standard
DBISAM ODBC Standard with Source
DBISAM ODBC Trial
DBISAM VCL Client-Server
DBISAM VCL Client-Server with Source
DBISAM VCL Standard
DBISAM VCL Standard with Source
DBISAM VCL Trial