If you open a DITA document in text mode, run Acrolinx, and the results dialog shows a checking scope of 0, then Acrolinx isn’t able to read your document.
Open the Acrolinx Integration log (acrolinx_java_sdk.log) file. If you see "Error resolving entity", then Acrolinx isn’t able to read your document.
|Oxygen standalone and Oxygen for Eclipse
If you switch from text mode to author mode, Acrolinx will be able to read your document correctly.