I have a problem with the preset parameters in cognos.
I go to the properties and check in Report View's tab the "Prompt Values" saved (option "View all") and I see a specific value. Then I go to "Edit" and Cognos selects another value as default (really close to the value I saw with the option "View all").
If I clear the prompts values and make the preset again it works fine during a while, but suddenly the error appears again.
This is a known bug in Cognos?
I got the answer.
The ETL process, that feeds the table, updates the value in each run.
So Cognos remembers the value, but this value is associated to a different caption in each run.
The solution was to change the way the ETL process updates the table to preserve the ids.