DXF output fails sometimes

Our output dxf task sometimes fails becasue "does not meet the conditions of any category" when the only condition is that it ends in .dxf

The task works about 95% of the time, and again since the only condition of the category is that it ends in .dxf which is a part of the task itself, how can it not meet the condition of the category...?

Any help would be appreciated. 

SolidworksSolidworks Pdm enterprise Pdm