Data Functions are not listed in the Data Function Transformation dialog

Data Functions are not listed in the Data Function Transformation dialog

You can add data functions as a transformation to transform your data table. To add the data function as a transformation,
a. Select "Data > Transform Data" from the main menu in the Spotfire desktop client
b. Select "Data Function" from the Transformations drop down list, and select Insert
c. Choose from the list of data functions saved in the library and select OK

Some of the data functions saved in the library may not be available for selection in this dialog. If a particular data function is missing from this list, then it could be because that data function is not qualified to be used as a transformation. To use a data function as a transformation, the data function must use a single Spotfire data table as input and a single data table as output. There must be no other input parameters.
  Doc: Details on Data Function – Transformation

• https://docs.tibco.com/pub/sfire-analyst/10.8.0/doc/html/en-US/TIB_sfire-analyst_UsersGuide/index.htm#t=df%2Fdf_details_on_data_function_transformation.htm