Hi,
You may have declared your material number as "Raw Material" in t.code:J1ID in Material and chapter- Id combination segment but cross check did you declared your material number as INPUT material with your plant in CENVAT Determination segment in t.code:J1ID, if not – then declare by entering your material number as INPUT material with your plant in CENVAT Determination segment and save.
Now try your transaction process with that material number with plant.
Regards,
Biju K