Finding Error Messages in the Maintenance Optimizer 
If problems occur in the product maintenance transaction, you can find detailed information as follows:
on the Log tab
The tab lists all messages, exceptions and errors, and is directly in the Maintenance Optimizer.
in the application log
The application log is a tool which captures messages, exceptions and errors. This information is put in a log and displayed.
To see the entries in the application log, call the transaction SLG1.
To see the entries for the Maintenance Optimizer in the application log, enter:
Object: SOLAR
Subobject: SAP_BACKEND for the SAP Service Marketplace; or SAP_BACKEND_MOPZ for the Maintenance Optimizer
Time Restriction: Enter an appropriate time period, e.g. the previous day, or last week.
User: <User name> of the SAP Solution Manager user
The Display Logs screen appears.
Open an entry in the log entry list, by clicking on it. The message text is displayed at the bottom of the screen.
To get further details of the message, double-click on it. You go to a dialog box which contains the information required for the error handling, e.g. to create an error message:
Application
Action
Version
Destination (for the download basket)