Missing Value for Calculation

Hi,

I am wondering why I am getting N/A for a number of my percentage change columns. Some symbols have N/A for just certain time periods while others have this for 1m, 5m, 10m, 30m and 60m columns. Frequently all of the percentage change columns will briefly show N/A before displaying a value. When I hover over the N/A the program displays the message ‘Missing value for calculation’. The daily period is ok. This is happening in both the web and desktop 4.0 early release versions. I never encountered this in the classic version. Any help with this would be much appreciated.

Suke