64bit server mode is used when running DQM queries alone. PowerCubes are not on the list of OLAP data sources compatible with DQM.
When attempting to run reports that are built from an IBM Cognos PowerCube based packages you will receive the following error:
QFS-ERR-0141 - This report service is configured as 64-bit and only supports packages published with DQM
Running reports from packages that are not published for DQM from data sources that aren't able to leverage DQM.
Diagnosing the problem
Determine the following:
1. Is the data source you're using to build the published package on the list of supported DQM data sources? This can be determined by visiting the IBM Cognos <version> supported environments page.
2. Is the package being published with DQM enabled? Determined by checking the package properties in IBM Cognos Connection, if already published.
Resolving the problem
If you're using a data sources that is listed as being DQM compatible then re-publish the package and enable DQM when the selection is available.
If you're not using a data source that's listed as being DQM compatible then you must use another data source type.