IBM Cognos User Manual page 297

You have tried to delete a measure that is used as a weighting for a Regular, Time
state, or Duplicates rollup.
Procedure
Before you try to delete a measure, make sure it is not being used as a weighting
factor for another measure.
TR1308
This measure is referenced by calculated measure measure_name. Please redefine
the calculated measure.
You have tried to delete a measure that is referenced by another measure.
Procedure
You cannot delete this kind of measure from a model unless you first redefine the
calculation or calculated measure that uses it.
TR1309
The calculated measure cannot use Before Rollup timing because it refers to a
calculated measure with an After Rollup setting.
You have tried to specify a rollup setting for a calculated measure that references
another measure, but the setting you chose conflicts with that used for the
referenced measure.
Procedure
Redefine the timing settings so that both measures use the same type of rollup. For
example, you cannot specify a regular timing of After Rollup for a calculated
measure M1, if M1 is referenced in the expression for calculated measure M2, and
the timing for M2 is Before Rollup.
TR1310
A measure was expected but not found. Either you have referred to a measure by
an object name or object identifier that Cognos Transformer is unable to locate, or
you have not referenced the measure.
This error occurs when MDL syntax requires an object and is unable to find it. In
this case, the object is a measure.
The problem may be that the measure was not referenced, or that it was referenced
with an incorrect object name or object identifier.
Procedure
You can verify Cognos Transformer object names and identifiers on the Windows
interface. To make them visible, select the Object name and Object identifier
check boxes on the Titles tab of the Preferences property sheet. The object name
and identifier will appear in the title bar at the top of each property sheet, and also
Appendix C. IBM Cognos Transformer Error Messages
283