It seems QlikSense variables are stored even after the variable definition is deleted, which can cause unexpected results. It can make things very difficult to debug when there is no variable defined in the load script, but it is used (and has a value). How can I clear ALL variables at the start of my load script (without knowing variable names)?
First of all, let me clarify that you do not need to declare all variables that you will use at the beginning of the script: If it was used on a previous run of the script or if it was created from the user interface, it will be saved and you can call it again whenever you want during the script (using the last defined value) The first time you run the script, you create the variable.
LET vTest = 3;
vTest = $(vTest) * 2;
If you don't change the script, the variable already exists with value six (6) , but when you reach here, you redefine the value of vTest again to three(3) and then to six (6)
LET vTest = 3;
vTest = $(vTest) * 2;
Qlik remembers the value of this variable, so if you don't change it, Qlik will only read this:
vTest = $(vTest) * 2;
This is working as intended, since the Idea is that (in some cases) you can define Variables from the user interface or from outside the application (via EDX or QMC in QlikView, for instance)
