Import
As for the export, check that the units match in ESAComp and the Ansys Composite Prep application.
In ESAComp, there are 2 ways to export the data:
Script Format (recommended)
In ESAComp, you can export Plies and Laminates through the FE Export / ANSYS ACP option in the menu. It generates a Python script, in which all the information is stored in ACP format.
XML Format
In ESAComp, export your data as .XML file using the File menu. Import this data in the Ansys Composite Prep application with the context menu for the Material object in the Tree (see Material Data).
Only material data can be imported.
Important: The Import from ESAComp XML operation does not create the material in the Ansys Composite Prep application. It only changes the properties. So the material must be created before with the same name as in ESAComp.