As you know, SEFAZ made some changes for MDF-e with version 1.00a and we have created a note to deal with that. The main change is the removal of the option of informing paper invoices in the layout of MDF-e and the possibility of multiple CIOT in road transportation.
Please check SAP Note 2138917 – Support of the changes made by MOC 1.00a of MDF-e.
Please note that again, these changes impact in the proxy generation, so please read all manual pre implementation steps very carefully!!
We would suggest you to upgrade your system to SP20 as soon as possible which should be released on the third week of April.