The following example demonstrates how you could accidentally hide all messages from the Error View.
Define two filters as follows:
§ Filter1 hides all messages in moduleA.dll
§ Filter2 hides all messages in moduleB.dll
(Note: Hide messages that match this filter is selected in the Advanced tab in the filter Properties dialog box for each filter.)
Combine the filters in a group and select Hide messages where at least one filter or group doesn't match in the Advanced tab in the filter group Properties dialog box.
When Purify detects a message in moduleA.dll it evaluates the filters in the group together and removes the message because it does not match the second filter. When Purify detects a message in moduleB.dll it evaluates the filters in the group together and removes the message because it does not match the first filter. When Purify detects a message in any other module it removes it because it does not match either filter in the group. Therefore, nothing appears in the Error View.
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