Processing of pool tables (&1) is not supported

What causes this issue?

An attempt was made to use table &v1& for data extraction. However,
table &v1& is a pool table. You can use only transparent tables for
data extraction.

System Response

Pool table &v1& cannot be used for data extraction.

How to fix this error?

Select a transparent table.

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.