You have not maintained Customizing for Document Type &1

What causes this issue?

Document Type <(>&<)>1 has not been mapped in Customizing

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

Map the document type in the system (specified in an invoice) to the
corresponding type in SAF-T.

How to fix this error?

You must maintain Customizing for Document Type <(>&<)>1.
for FI documents maintain
<DS:SIMG.SAFTN_AO_FIDOC_RNG>Map Document Type to FI Number Range</>
for SD documents maintain
<DS:SIMG.SAFTN_AO_SDDOC_RNG>Map Document Type to SD Number Range</>

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.