No handling resource in order for product &1 in location &2

What causes this issue?

When materials are transferred from SAP R/3, an individual activity is
generated in SAP APO for the goods receipt processing time. A handling
resource has to be created in SAP APO for this.
A handling resource has not been entered in location &V2& or the
handling resource is not assigned to the active model in SAP APO (000).
A goods receipt processing time is defined in the SAP R/3 in-house
production order for the product &V1& in location &V2&.
This goods receipt processing time cannot be taken into consideration
in the SAP APO in-house production order, because the relevant handling
resource is missing.

System Response

The goods receipt processing time cannot be mapped in the SAP APO
in-house production order. The data transfer is stopped.

How to fix this error?

Create a handling resource in location &V2&.
<DS:TRAN./SAPAPO/RES01>Create Handling Resources</>
Specify <LS>handling unit</> (<LS>H</>) as resource category.
Use a resource with unlimited capacity scheduling and a working time of
24 hours (standard capacity from 00:00:00 to 24:00:00).
The resource can be a single-activity resource or a multiactivity
resource. If the resource is also used in Supply Network Planning
(SNP), the handling resource has to be a mixed resource.
Note that the handling resource also has to be assigned to the
integration model.
Assign the handling resource to the location &V2&.
<DS:TRAN./SAPAPO/LOC3>Assign Handling Resource to the Location</>
Define the handling resource on the <LS>Resources</> tab page in the
<LS>resource inbound</> field.
Reactivate the queue that contains errors.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.