Unpermissible use of conversion 03 at header end.

What causes this issue?

The conversion option 03 cannot be used for the last field of the
header.

System Response

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

How to fix this error?

Please contact your system administrator

Procedure for System Administrators

Determine the incorrect entry in Customizing in <LS>Personnel
Administration</> in the <LS>Header Structure per Infotype</> view in "
<DS:SIMG.OHIX0635>Define Infotype Header</>" and correct it.

Error message extract from SAP system. Copyright SAP SE.