Trend popup in citect

Hello
I am using citect 7.40 and in this i want to popup an specific trend using Trendpopup() by clicking on a button. when i used this function in button, my process analyst page comes, but no pen or cursor is added on the screen.
Can anyone help me on this?

Can you post the Cicode you are using in the button? Is the function returning a 0?

I am using TrendPopup("Tag_trends", "AVVNL_SCADA") FUNCTION, where Tag_trend is page name in which process analyst is present, AVVNL_SCADA is trend tag.

Oh I have a feeling it's not used with process analyst but rather with the old trend pages from the CSV include project? Does the function return a 0 if you say

iError = TrendPopUp