Data integration job for data export generating dat file instead of csv

Hi Experts,

We have a data integration job which exports data from the planning application. The job is setup to export data in csv file with a name given in Options of data integration job. When I run the job, it exports data in .dat format instead of csv and the name of output file is not matching as per the name given data integration job options. The name of the export file in output folder is same as the name of the Target application in the data integration job. The job used to work fine before. Nothing has changed in