EPS Saving Files in CS6 Error

Thank you for checking that out for me. When I build a pattern it does not always start at this scale it's often smaller. And let's be honest PS artist files are a much larger size, even artwork imaged traced in AI would result in a large file. The reason for the pattern being that size is because it's for wallpaper. Now there seems to be a trend on making prints large on the wall. I'm not sure what you mean when say work in a smaller swatch or rethink my pattern when creating it, I did (lines and circles simple) the client wants large-scale patterned on the walls. On a 2.75 mt wall this print has to show large, so small pattern is not what the client wants and if they're going to buy it they want to see it true to scale. In order for me to do that my A4 image starts at full scale and then I reduce the image down to A4 sizing for samples to show clients what it will look at on a wall. And to be honest with you this is not the largest prints there are maps print that take up the whole 3mt high wall (325cmvx250cmh). Did not have an issue with this large file at all. I really think this was a corrupt fill for some reason, it happens.  If I design a card print or wrapping paper different scale but this is not the case and I have no idea how to make a small scale repeat in the right measurements for the client to see the correct scale mockup. They also need a sample of it on the correct scale which is the background on the A4 page. 

Thank you for all your time it's greatly appreciated.                                                                                                                                                                                                                                                           

Is the pattern applied to a shape in that file?

And if so: how large is the pattern?