Cognos 8.4 Error

I am trying to Drill through to my detail report and am getting a UDA-SQL-0460 error.  The parameter it's balking at is data like '15-19', '20-25'.  Obviously defined as char in the db but I think it's trying to add the numbers together and then complains that I am adding characters.  Here is the first line of the error message.  The rest is the usual gibberish.

UDA-SQL-0460 A general exception has occurred during local processing.UDA-EE-0094 The operation "add" is invalid for the following combination of data types: "character" and "double"

Apparently this is not a big issue in ReportNet.  Any help would be greatly appreciated.  Thanks, steve.
Steve4400Asked:
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SNeupaneConnect With a Mentor Commented:
Glad you got it resolved.
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SNeupaneConnect With a Mentor Commented:
First of all, does your drill through report run by itself??
If it is, then select the data column in Cognos report and then in the properties, select 'None' on aggregate and rollup aggregate fields.
It must be set to automatic and it's trying to add.
That should resolve the issue.
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Steve4400Author Commented:
Thanks SNeupane,
I tried that and varified all other properties.  Unfortunately the problem still persists.
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SNeupaneConnect With a Mentor Commented:
If you are certain that the type of data is the issue, then you have to cast the data item to appropriate type.
For example, double click on the data item and the data item for parameter with a cast statement to make both the same.
cast([Data item], varchar (10))
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Steve4400Author Commented:
Thanks for taking the time to ponder this SNeupane!  I figured out the problem.  I am maintaining a report that somebody else wrote without documentation.  I was sending my string to a numeric value set up in the content store.  They both had the same name so I didn't think to look there 'till today.  Once I changed it to look at the correct value I was godd to go.  Thanks again.

BTW - your first respone was also part of the solution.  The aggregate property was indeed set to count.
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