how do I import tecplot file to fluent
 

The actual problem is the following:

I have a data file created with fortran, I use tecplot to see the mesh created from that file. I want to import this file to fluent through tecplot but fluent accepts only tecplot binary file and I do not know how to convert to this type. I have tried importing the layout file of tecplot and it does not work. I also tried preplot which succesfully created the plt file but stil I get an error the following Error Object: #f