3056422 - Data type conversion is not possible. Argument to UCASE must be binary or string - SAP IQ

Select query is hitting an error IQ 16.1, that worked just fine in IQ 16.0:

• From dbisql
  There was an error reading the results of the SQL statement.
  The displayed results may be incorrect or incomplete.
  Data type conversion is not possible. Argument to UCASE must be binary or string.
  -- (dflib/dfe_StringFunction.cxx 1025)
  SQLCODE=-1009145, ODBC 3 State="HY000"
• From Application:
• Cause: java.sql.SQLException: [Sybase][JDBC Driver][Sybase IQ]Data type conversion is not possible. Argument to UCASE must be binary or string.

SAP IQ 16.1

non-binary non-string uppercase upper-case , KBA , BC-SYB-IQ , Sybase IQ , How To