if you recive the error "Cant find pckage SPI_AV" it is very likely that the AutoPath Statment that resides in the Test.TCL file is incorrectly set
The Error Will look something like this, when you try to run your test
C:\New folder\http_GET_10>tclsh test.tcl
Please refer to your instaltion Directory for Exact Version number- AutoPath Statement should look like this (Defaults shown) -
set auto_path [linsert $auto_path 0 "C:/Program Files/Spirent Communications/Spirent TestCenter xxxx/Layer 4-7 Application/TclAPI"]
whrere xxxx = version number