Avoid "Report is running" Message when calling report through URL

[Meutte]

Hi,
We're creating a script to call a report through URL paramaters and capture the result.
However the first result we get is 'Your report is running    Instead of waiting...'
When the report is very fast we don't get this screen but the report returns immediately.

This causes issues because we grab the first result, therefore we would like to block (for a specific user) the 'Your report is running    Instead of waiting...' message.
Is there any way to do this?

thanks