In the tab of suppression particular messages you can set filtration of errors by the text they contain.
When it's necessary you may hide from analyzer's report the diagnosed errors containing particular words or phrases. For example, if the report contains errors in which names of printf and scanf functions are indicated and you consider that there can be no errors relating to them just add these two words using the message suppression editor.
Please note! When changing the list of the hidden messages you don't need to restart analysis of the project. The analyzer always generates all the diagnostic messages and the display of various messages is managed with the help of this settings tab. When modifying message filters the changes will immediately appear in the report and you won't need to launch analysis of the whole project again.