SAP Message 56257 - Entry in Infotype 0105 missing for your user name

Diagnosis
To perform authorization checks, the system tried to derive yourpersonnel number from your user name. This is done via infotype 0105.Your personnel number could not be determined because infotype 0105 hasnot been maintained, or not correctly maintained. An entry of type 0001(system user name for SAP System) with ID/number = user name ismissing.

System Response
Processing was terminated.

Procedure
Please contact system administration so that an entry can be made ininfotype 0105.