This article applies to both oXygen standalone and oXygen for Eclipse.
If you open a DITA document in text mode, run Acrolinx, and the results dialog shows a checking scope of 0, then Acrolinx is not able to read your document.
Open the plug-in log (acrolinx_java_sdk.log) file. If you see "Error resolving entity", then Acrolinx is not able to read your document.If you switch from text mode to author mode, Acrolinx will be able to read your document correctly. This is the only current workaround we have available.