Make "Main Work Center" in IW31 not mandatory This topic has 1 reply, 2 voices, and was last updated 5 years, 4 months ago by ayush. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts May 20, 2019 at 1:02 pm #22686 AnonymousInactive Dear Experts, I have an requirement where I need to make “Main Work Center” in IW31 not mandatory. However I understand that field is Mandatory by SAP as default. Please need your kind suggestions as solution so as to resolve the same. Somya August 15, 2019 at 7:50 am #22848 ayushParticipant Hi Somya, Use t.code OPFA and change the required field to optional this will solve your problem. Thanks Ayush Bhardwaj Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Enter something special: Log In