When you upgrade IBM Cognos 8 to version 8.3, some reports may look or behave differently after the upgrade. This section describes changes that you may encounter in your reports.
When you upgrade from IBM Cognos 8 BI version 8.2 to version 8.3, some features in IBM Cognos 8 may behave differently after the upgrade. When you upgrade reports, for example, changes in behavior may cause validation errors. Documentation is available about the behavior changes. This documentation includes examples of the changed behavior and solutions for issues that may occur during the upgrade. For more information, see Upgrading to IBM Cognos 8 BI 8.3: Changes in Product Behavior on the IBM Cognos Resource Center (http://www.ibm.com/software/data/support/cognos_crc.html).
If you upgrade a crosstab report that uses a SAP BW data source and includes calculations, filters, or nesting, the suppression of null values may not occur as expected. You may see additional empty rows and columns.
By default, null values are suppressed for list and grouped list reports.
To effectively remove null values in crosstabs that use a SAP BW data source, insert individual members to create the report. You can also ensure that SAP BW members are assigned to proper dimension hierarchies and levels within the BW cube.
You may encounter missing thousands separators in your reports in the following circumstances:
The report contains an item that does not specify an explicit data format.
The report item refers to another item in the same report.
That second report item refers to an item in the Framework Manager model with Usage property set to Identifier or Attribute.
The model item does not specify an explicit format.
To restore the data formats, specify an explicit format either in the report item properties or in the model item properties.