ID:296037 Can't import assignments from MAX+PLUS II Assignment and Configuration File <name>

CAUSE: You attempted to import MAX+PLUS II assignments from the specified MAX+PLUS II Assignment and Configuration File (.acf) into the Quartus Prime Setting File (.qsf) for the current project. The Quartus Prime software cannot successfully import the assignments from the ACF, or the corresponding QSF is not available in the current project directory. This error can occur because you did not specify a legal ACF name, the QSF is not in the current project directory, or you do not have permission to write to the current project directory.

ACTION: Click OK to close the message dialog box, and then make sure you specified a legal ACF name, that the QSF is available in the current project directory, and that you have permission to write to the current project directory.