In some of the options, you inserted number of modes = 26. How did you get to this number?

I am facing some problem with generating .mnf file. I am trying to get a model of flat plate (shown on the image) and then .mnf file to import it to adams. But the problem is when I apply only DOF (6 degrees for 4 corners of the plate) I get an error that attachment has no rotational degree and the body in ADAMS doesnt move in any direction. So I tried to make one short surface of the plate rigid (with SPIDER utility), as I understand it as equivalent for constrains. But after that .mnf file is not generated. In the end I have tried to make holes in plate in the same way as in tutorial and finally the flexible body moved in ADAMS but forces that moved body were like 1GN instead of 0.2N (compared to simulation made in Patran with model without holes with the same material properties). I would be very grateful for any kind of help. Thanks in advance.

when I am trying to create new flexible body directly in adams, after all procedure you have shown( I mean defining mesh properties and attachment selection", after clicking on apply; I faced with this error: "Storing Solid Mesh Data... Creating Flexbody preview in progress... ERROR: mnf creation failed. ERROR: For more details please check tmp_flex.f06 log in working directory."

Thanks. Why I'm not getting the .mnf file?