Tabcmd Live Connection with Filters and refresh = 'Yes'?

Hi All,

All my dashboards are running on live connection and i am using tabcmd to pass the filters and export the PDF

my tabcmd is as follow

tabcmd export "Reportname/Dashboardname.pdf?category=abc" --pdf -f "C:\Path\Temp\final.pdf"

since my dashboards are running on live when new data updates exported version not giving new data still showing old data how to add refresh=yes with export

tabcmd export "Reportname/Dashboardname.pdf?category=abc?:refresh=yes" --pdf -f "C:\Path\Temp\.pdf"

I am getting blank screen i am not getting where i am doing wrong

TIA

BR,

NB