Recovering a Failed Model

To help you recover from power failures or similar processing interruptions without having to recreate the entire cube, Cognos® Transformer adds checkpoint entries after each major stage in the cube creation process.

These checkpoints are written to a temporary .qy? file in the folder specified by Model temporary files on the Directories tab of the Preferences property sheet. The .qy? file is deleted when processes end normally; as a result, the existence of a .qy? file indicates that Cognos Transformer terminated unexpectedly.

The next time you start Cognos Transformer, you will be asked if you want to see the list of suspended models. You can either open the model at the last checkpoint before failure and continue to develop it from that point, or continue from the point where you last saved the file. The .qy? file is deleted.

Cognos Transformer also writes messages to a log file which is stored in the location specified on the Directories tab of the Preferences property sheet. The log file has the same name as your model, with a .log extension. If Cognos Transformer is unable to recover automatically from the processing failure, or if you choose to ignore previous processing and begin again, you can read the log file to find and correct the cause of the failure.