This morning I had this problem again and I left out a step to fix this error.  I went to the 1120S Dep Opt worksheet and zeroed out the carryforward amount and did that also on the Form 4562.  I then reentered the same amount on both the 1120S Dep Opt worksheet and Form 4562 and it cleared the error.  I hope this additional information will get you  through this problem.