Hello Piwik Team,

First, I want to say Thank you for this great tool.

But I have faced a problem with Piwik API.
Below are the steps of how the problem can be achieved:
1. Making a request to any widget without specifying @columns parameter. e.g.: index.php?module=API&format=html&method=VisitsSummary.get&idSite=2&period=range&date=2011-10-01,2011-10-01 first screen shot

It returns Visits = '4' and it's Ok.

2. Making request with incorrect @columns parameter. e.g.:
index.php?module=API&format=html&method=VisitsSummary.get&idSite=2&period=range&date=2011-10-01,2011-10-01&columns=nb_act second screen shot
It returns '0' and it's Ok as such a metric doesn't exist.

3. Making request without @columns parameter again (The same as in first step). e.g.:
index.php?module=API&format=html&method=VisitsSummary.get&idSite=2&period=range&date=2011-10-01,2011-10-01 third screen shot
It returns Visits = '0' and it's _not Ok_.

Please, let me know if something is unclear.
Waiting for your response.
Thank you.

Regards,
Alex Karpov
Keywords: API, incorrect parameter