Hi Dayan,
Try to attach the Set Types:
"COMM_PR_MAT", "COMM_PR_UNIT", "COMM_PR_SHTEXT", COMM_PR_BATCH, COMM_PR_LGTEXT, COMM_PR_LGTEXT1,COMM_PR_LGTEXT2, to the Category "MAT_" and then run the Initial load again.
Hope this will be useful
Thanks and Regards
DJ