Hi,
just check project profile in opsa and also check validation if that project profile is there for it's custom check? even above suggested this thing.
if this is the condition then check config doc where it would be mentioned in validation like if project profile XXXXXX then coding mask YYYYY system should pick.
so hear we can say validation is preventing you to create project with wrong coding mask so check it.
Regards,
Sanjeev
