IBM Cognos User Manual page 300

Procedure
To resolve the problem, you can restore the model from a .mdl backup file, or
upgrade to the current version of Cognos Transformer (.pyj) and migrate your
models as .mdl files.
TR1700
The category category_name in the dimension dimension_name has n immediate
descendants. This number should normally be close to 7. More levels may be
appropriate in this dimension.
This message is a design recommendation and will not affect your ability to
generate categories or create PowerCubes.
Categories with too many immediate descendants yield reports that are difficult to
use. For example, in a time dimension with only two levels, Years and Days, each
Year category has 365 immediate descendants. Navigating through the resulting
reports would be difficult.
Procedure
To improve OLAP performance and usability, add manual levels to create a
structure that limits the number of immediate descendants at each parent level. We
recommend a child:parent ratio of 10:1 or less. In the above case, add intermediate
levels for Quarters and Months.
Tip: You can change the warning level by changing the default Warn when the
number of child categories exceeds setting located on the General tab of the
Preferences property sheet. The default value is 35.
TR1703
A data input conversion or overflow error occurred at source record number n for
measure measure_name in source file file_name.
This error may be caused by an incorrect data type for the measure.
Procedure
To resolve the problem, ensure that the data type is valid for, and matches, the
values stored in your data source.
TR1900
The wrong ID stamp was detected on cube_name. This often happens when the
model is not saved after creating a PowerCube.
Cognos Transformer has detected an inconsistency between the model and the
PowerCube that you are trying to update.
This can occur when you try to update an incrementally updated PowerCube
using a version of that cube other than the one the model was most recently saved
with. For example, if you save a model after creating a PowerCube using February
data, you cannot restore the January version of the PowerCube without raising this
error.
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IBM Cognos Transformer Version 10.1.1: User Guide