Diagnosis
When you make entries in the field "Search help" a search help isassigned to the input/output field being edited. This can happen eitherstatically or dynamically.
In this case, you have made an invalid entry.
For static assignment purposes, a valid entry is the name of a searchhelp which is defined in the ABAP Dictionary and also active.
For dynamic assignment purposes, a valid entry is the name of a globalvariable which is defined in the program/module pool and prefixed with a':'. At runtime, the value of the variable is then interpreted as thename of the search help.

System Response
Input rejected.

Procedure
You can get a list active search helps from the R/3 RepositoryInformation System or through possible entries in the ABAP Dictionary.