Hi ,
I too had similar issue while working with a calculation view where I was doing a union with two analytical views.
The issue happens if you use the projections while using analytical views and try to change the default Projection name to a new name which has spaces into it. for e.g. "Projection_1" to "Projection New". Silly , but spent couple of hours on it 
.
Solution worked for me : Remove any spaces while naming the projections.
Regards,
Ankit