If you receive a LANSA Open Validation Message dialog which states "No file definition found with full or partial name," then you have not imported the LWEBSF save file into the partition. Check that you have specified the correct partition in the sign on screen. For more details, refer to Web Enable the Partition in the Web Administration Guide.
You may have missed importing the LWEBSF save file if you have:
Also check that the initial library list of the connecting user's job description is in the sequence QTEMP, QGPL and DC@PGMLIB.