There is another alternate way and easier approach to do this.open the EDI Module home page and click on install TN Document types and select the standard, version and the transaction set and click on install.this will create the scchema and the dictionary in WmEDIforTN/EDIFFSchema.
We have the same problem,
We use trading Networks, so we created the dictionary and the schema from the home page /EDI/install TN Document Types
and when we try to run the service “create TemplateFromSEF”, we got the following message :
Could not run ‘6createTemplateFromSEF’.
com.wm.ff.parse.StorageException: [FFP.0000.0026] Unable to find Flat File Dictionary: WmEDIforTN.EDIFFSchema.X12.V4010.Dictionary