IBM Cognos User Manual page 309

Procedure
If you encounter this error, ensure that the category object identifier that you
specified in the CatUpdate or CatMake statement does not refer to a special category.
You can find object identifiers in the .mdl file. For more information, see the
Cognos Transformer Developer Guide.
TR2505
Special categories cannot be cloaked in dimension views.
This error typically appears in the log file in response to an action requested by an
MDL script. Under normal circumstances, the Windows interface does not allow
you to perform exclude, summarize, or cloak actions on special categories in a
dimension view.
Procedure
If you encounter this error, ensure that the category object identifier that you
specified in the CatUpdate or CatMake statement does not refer to a special category.
You can find object identifiers in the .mdl file. For more information, see the
Cognos Transformer Developer Guide.
TR2506
An apex action cannot be done with special categories.
This error typically appears in the log file in response to an action requested by an
MDL script. Under normal circumstances, the Windows interface does not allow
you to perform exclude, summarize, or cloak actions on special categories in a
dimension view.
Procedure
If you encounter this error, ensure that the category object identifier that you
specified in the CatUpdate or CatMake statement does not refer to a special category.
You can find object identifiers in the .mdl file. For more information, see the
Cognos Transformer Developer Guide.
TR2507
This dimension view cannot be deleted. It is pre-defined.
You have attempted to delete one of the following predefined dimension views:
v
v
These default dimension views are created for every dimension, and are used to
include or exclude entire dimensions from a PowerCube.
Procedure
To avoid this problem, do not delete, reorder, or rename these predefined views.
All Categories
Omit Dimension
Appendix C. IBM Cognos Transformer Error Messages
295