I am running 6.4 and Calc Pivot Table won't refresh.

How do I correct this problem? After source Sheet has reached over 700 rows, the associated pivot table has ceased to allow me to refresh it.

I am having a similar issue (but I’m on 6.3.6.2, the latest available for Archlinux): refresh works for a while, then all connections to the source data is lost and I have to recreate the pivot table from scratch. This happens both for small data set (<100 rows) and larger one (~1000)