Recently I have seen with some of our clients that they are having issues with OBIEE 10.1.3.4 presentation services being crashed when using a pivot table view.
This seems to be a bug thanks to my friend John who has informed about the bug & Oracle has come up with an excellent OBIEE 10.1.3.4 patch set to solve this issue.
The patch set is accessible through
https://metalink3.oracle.com/od/faces/secure/ml3/patches/PatchDownload.jspx?mc=true