Sometimes when opening an indexed file in SVEditor, it has a bunch of red X markers in the file, indicating issues. However, the Problems view is empty and the file does not have a red X in the Project Explorer.
There are a couple workarounds to this issue:
Option A. remove/delete the file from the project, re-index, add the file back, re-index
Option B. delete the problematic lines from the file, re-index, add the lines back, re-index