The report has been generated.

What causes this issue?

This report has not been generated in your system. Generation causes an
executable program to be created from the report definition. This
procedure is only necessary for new installations.

System Response

The report could not be accessed immediately because the report had to
be generated first. This delay will not occur when you call up the
report again.

How to fix this error?

You can continue processing.
Note: You can generate standard reports using the configuration
function. Here you can run the generation in the background, which
shortens the generation time.

Error message extract from SAP system. Copyright SAP SE.