Dynpro &1 &2: Generation error

What causes this issue?

Screen &V1& &V2& contains a syntax error. The error text is displayed
in a log line.

System Response

The screen cannot be generated.

How to fix this error?

If the log line with the error text is not yet visible, expand the log
using <LS>Expand</> or <LS>Expand all</>.
To analyze the error in more detail, you can check the screen in
transaction SE51 by choosing <LS>Screen</> -> <LS>Check</>. The faulty
section is displayed in the screen editor.
<ZH>Note</>
A screen may be faulty in the transport target system, despite
functioning correctly in the source system. This is due to the
different environment (missing or different INCLUDE programs or ABAP
Dictionary objects) that the screen encounters in the target system.
Check if the error can be corrected by transporting dependent objects.

Error message extract from SAP system. Copyright SAP SE.