No material assigned to tank until now

What causes this issue?

No material is assigned to the tank.

System Response

No tank dips are possible without tank material assignments, since no
product can be measured.

How to fix this error?

Assign the relevant material segments to the tank.
<DS:TRAS.O4NA>Assign a material to the tank</>.

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.